mh:wikigenius>OtondoNnna at 04:09, 2 December 2024

2024-12-02T04:09:46Z

← Older revision		Revision as of 10:09, 2 December 2024
Line 4:		Line 4:

	== History ==		== History ==
	In October 2022, the NFT collection ''[https://opensea.io/collection/pentocoin NFT PentoCoin]'' was created and listed on [[OpenSea]].<ref>~~{{cite news\|title=PentoCoin\|url=~~https://opensea.io/collection/pentocoin~~\|accessdate=9 June 2023\|publisher=opensea.io\|date=}}~~</ref> The first item from the collection is given on the ''Opensea'' platform.<ref>~~{{cite news\|title=PentoCoin #1 2 3 4 5 6 7 8 9 10 11 12~~		In October 2022, the NFT collection ''[https://opensea.io/collection/pentocoin NFT PentoCoin]'' was created and listed on [[OpenSea]].<ref>[https://opensea.io/collection/pentocoin "PentoCoin"]</ref> The first item from the collection is given on the ''Opensea'' platform.<ref>[https://opensea.io/assets/ethereum/0x495f947276749ce646f68ac8c248420045cb7b5e/23467797326275027743874371014149683281019546929197637997700847618907801911297 "PentoCoin #1 2 3 4 5 6 7 8 9 10 11 12"]</ref>
	~~\|url=~~https://opensea.io/assets/ethereum/0x495f947276749ce646f68ac8c248420045cb7b5e/23467797326275027743874371014149683281019546929197637997700847618907801911297~~\|accessdate=~~9 ~~June 2023\|publisher=opensea.io\|date=}}~~</ref>

	== Overview ==		== Overview ==
Line 18:		Line 17:
	P(12, 12) = 12! / (12 - 12)! = 12! Where "!" denotes factorial. Let's calculate it:12! = 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 479,001,600		P(12, 12) = 12! / (12 - 12)! = 12! Where "!" denotes factorial. Let's calculate it:12! = 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 479,001,600

	The 6×10 case was first solved in 1960 by [[Colin Brian Haselgrove]] and [[Jenifer Haselgrove]].<ref>~~{{cite journal \|author=C. B. Haselgrove \|author2=Jenifer Haselgrove \|date=October 1960 \|title=A Computer Program for Pentominoes \|journal=~~[~~[Eureka (University of Cambridge magazine)\|Eureka]] \|volume=23 \|pages=16–18\|url=~~https://www.archim.org.uk/eureka/archive/Eureka-23.pdf}}</ref> There are exactly 9356 solutions, including trivial variations obtained by rotation and reflection of the whole rectangle and including rotation and reflection of a subset of pentominoes (which sometimes provides an additional solution in a simple way). The 5×12 box has 4040 solutions, the 4×15 box has 1472 solutions, and the 3×20 box has just 8 solutions. In total, there are 14,876 combinations of pentomino shapes.		The 6×10 case was first solved in 1960 by [[Colin Brian Haselgrove]] and [[Jenifer Haselgrove]].<ref>[https://www.archim.org.uk/eureka/archive/Eureka-23.pdf "A Computer Program for Pentominoes"]</ref> There are exactly 9356 solutions, including trivial variations obtained by rotation and reflection of the whole rectangle and including rotation and reflection of a subset of pentominoes (which sometimes provides an additional solution in a simple way). The 5×12 box has 4040 solutions, the 4×15 box has 1472 solutions, and the 3×20 box has just 8 solutions. In total, there are 14,876 combinations of pentomino shapes.

	However, there are certain combinations of pentomino shapes that share the same combination of numbers. These combinations have a property called "sibling," where multiple different shape combinations correspond to a single combination of numbers. The creator of the NFT PentoCoin collection, [https://www.facebook.com/attewood Alex Carolus Rex Attewood], calculated that there are a total of 14,153 digit combinations that yield solutions for pentomino. Therefore, the probability of a 12-digit combination being a solution for pentomino is 0.00295204% (14,153 out of 479,001,600).		However, there are certain combinations of pentomino shapes that share the same combination of numbers. These combinations have a property called "sibling," where multiple different shape combinations correspond to a single combination of numbers. The creator of the NFT PentoCoin collection, [https://www.facebook.com/attewood Alex Carolus Rex Attewood], calculated that there are a total of 14,153 digit combinations that yield solutions for pentomino. Therefore, the probability of a 12-digit combination being a solution for pentomino is 0.00295204% (14,153 out of 479,001,600).

mh:wikigenius>OtondoNnna: PCoin

2024-12-02T04:04:02Z

PCoin

New page

'''[https://opensea.io/collection/pentocoin NFT PentoCoin]''' is a [[diamond]] in the world of [[Cryptocurrency|crypto]]. It is mined from the solutions of [https://en.wikipedia.org/wiki/Pentomino pentomino] puzzle. Derived from the Greek word for '5', and ''domino'', a pentomino (or 5-omino) is a polyomino of order 5, that is, a polygon in the plane made of 5 equal-sized squares connected edge-to-edge. There are 12 different pentominoes.

[https://en.wikipedia.org/wiki/Pentomino Pentomino] tiling puzzles and games are popular in [https://en.wikipedia.org/wiki/Recreational_mathematics recreational mathematics]. A standard pentomino puzzle is to tile a rectangular box with the pentominoes, i.e. cover it without overlap and without gaps. Each of the 12 pentominoes has an area of 5 unit squares, so the box must have an area of 60 units. Possible sizes are 6×10, 5×12, 4×15 and 3×20.

== History ==
In October 2022, the NFT collection ''[https://opensea.io/collection/pentocoin NFT PentoCoin]'' was created and listed on [[OpenSea]].<ref>{{cite news|title=PentoCoin|url=https://opensea.io/collection/pentocoin|accessdate=9 June 2023|publisher=opensea.io|date=}}</ref> The first item from the collection is given on the ''Opensea'' platform.<ref>{{cite news|title=PentoCoin #1 2 3 4 5 6 7 8 9 10 11 12
|url=https://opensea.io/assets/ethereum/0x495f947276749ce646f68ac8c248420045cb7b5e/23467797326275027743874371014149683281019546929197637997700847618907801911297|accessdate=9 June 2023|publisher=opensea.io|date=}}</ref>

== Overview ==
All 12 pentomino shapes are numbered from 1 to 12. The number of combinations from 12 unique digits is 479,001,600. It is calculated as follows:

The number of combinations from 12 unique digits can be calculated using permutations. Since each digit must be unique in each combination, we can use the permutation formula.

The formula for permutations, P(n, r), is defined as n! / (n - r)!, where n is the number of elements and r is the number of selected elements.

In this case, we have 12 digits, and we are selecting all 12 digits (r = 12). Thus, the permutation formula will look as follows:

P(12, 12) = 12! / (12 - 12)! = 12! Where "!" denotes factorial. Let's calculate it:12! = 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 479,001,600

The 6×10 case was first solved in 1960 by [[Colin Brian Haselgrove]] and [[Jenifer Haselgrove]].<ref>{{cite journal |author=C. B. Haselgrove |author2=Jenifer Haselgrove |date=October 1960 |title=A Computer Program for Pentominoes |journal=[[Eureka (University of Cambridge magazine)|Eureka]] |volume=23 |pages=16–18|url=https://www.archim.org.uk/eureka/archive/Eureka-23.pdf}}</ref> There are exactly 9356 solutions, including trivial variations obtained by rotation and reflection of the whole rectangle and including rotation and reflection of a subset of pentominoes (which sometimes provides an additional solution in a simple way). The 5×12 box has 4040 solutions, the 4×15 box has 1472 solutions, and the 3×20 box has just 8 solutions. In total, there are 14,876 combinations of pentomino shapes.

However, there are certain combinations of pentomino shapes that share the same combination of numbers. These combinations have a property called "sibling," where multiple different shape combinations correspond to a single combination of numbers. The creator of the NFT PentoCoin collection, [https://www.facebook.com/attewood Alex Carolus Rex Attewood], calculated that there are a total of 14,153 digit combinations that yield solutions for pentomino. Therefore, the probability of a 12-digit combination being a solution for pentomino is 0.00295204% (14,153 out of 479,001,600).

{| class="wikitable"
|Size
|Combinations of Shapes
|Combination of Digits
|Uniqueness, %
|Sibling
|% Siblings
|-
|6×10
|9356
|8819
|0,00183949
|1020
|10,90
|-
|5×12
|4040
|3887
|0,00070602
|303
|7,50
|-
|4×15
|1472
|1440
|0,00001251
|60
|4,07
|-
|3×20
|8
|8
|0,00000167
|8
|0,00
|-
|Total
|14876
|14153
|0,00295204
|1383
|9,30
|}

== Sibling Property ==
{| class="wikitable"
|Size
|Solutions
|combinations of shapes
|Sibling, %
|Combination of digits
|Sibling Level
|Uniqueness, %
|-
|6×10
|9356
|1020
|10,90
|483
|47,35
|0,00010069
|-
|5×12
|4040
|303
|7,50
|150
|49,50
|0,00003126
|-
|4×15
|1472
|60
|4,08
|28
|46,67
|0,00000585
|-
|3×20
|8
|0
|0,0
|0
|0,00
|0,00000000
|-
|Total
|14876
|1383
|8,36
|660
|47,72
|0,00013755
|}
{| class="wikitable"
| rowspan="3" |Size
| rowspan="3" |Solutions
| colspan="15" |Sibling
|-
| colspan="3" |2
| colspan="3" |3
| colspan="3" |4
| colspan="3" |5
| colspan="3" |6
|-
|Qty
|%
|%
|Qty
|%
|%
|Qty
|%
|%
|Qty
|%
|%
|Qty
|%
|%
|-
| rowspan="2" |6×10
|9356
|907
|6,10
|9,69
|39
|0,26
|0,42
|40
|0,27
|0,43
|10
|0,07
|0,11
|24
|0,16
|0,26
|-
|8819
|454
|0,00009476
|5,15
|13
|0,00000271
|0,14
|10
|0,00000209
|0,11
|2
|0,00000042
|0,02
|4
|0.00000084
|0,05
|-
| rowspan="2" |5×12
|4040
|291
|1,95
|7,20
|12
|0,08
|0,30
|0
|0,00
|0,00
|0
|0,00
|0,00
|0
|0,00
|0,00
|-
|3887
|146
|0.00003046
|3,76
|4
|0,00000084
|0,10
|0
|0,00000000
|0,00
|0
|0,00000000
|0,00
|0
|0,00000000
|0,00
|-
| rowspan="2" |4×15
|1472
|48
|0,32
|3,26
|12
|0,08
|0,82
|0
|0,00
|0,00
|0
|0,00
|0,00
|0
|0,00
|0,00
|-
|1440
|24
|0,00000500
|1,67
|4
|0,00000084
|0,28
|0
|0,00000000
|0,00
|0
|0,00000000
|0,00
|0
|0,00000000
|0,00
|-
|3×20
|8
|0
|0,00000000
|0,00
|0
|0,00000000
|0,00
|0
|0,00000000
|0,00
|0
|0,00000000
|0,00
|0
|0,00000000
|0,00
|-
| rowspan="2" |Total
|14876
|1246
|8,37
|8,36
|63
|0,42
|0,42
|40
|0,27
|0,43
|10
|0,07
|0,11
|24
|0,16
|0,26
|-
|660
|623
|0,00012988
|90,39
|21
|0,00000438
|3,19
|10
|0,000002085
|1,51
|2
|0,00000042
|0,30
|4
|0.00000084
|0,61
|}

There are 660 combinations of digits that yield 1383 combinations of pentomino shapes. Therefore, subtracting 1383 combinations of shapes with the sibling property from the total number of possible combinations, which is 14876, and adding 660 unique combinations of digits that yield pentomino solutions with the sibling property, we obtain 14153 combinations of digits that give pentomino solutions with the sibling property. Among them, 9.3% have more than one shape combination for each digit combination, indicating the presence of the sibling property.

The combination of digits 7 6 2 12 11 3 8 10 5 9 4 is the only one that serves as a solution for both the 6×10 and 5×12 size combinations of shapes. The probability of such digits combinations is 0,000000209238%.

== Pento Music ==
Associating each of the 12 pentomino shapes with a unique [https://en.wikipedia.org/wiki/Musical_note musical note] based on their respective numbers can create a musical representation of the pentomino solutions.

Assigning note C to shape 1 and so on, according to the table, you have generated a total of 14,153 unique minimal musical compositions corresponding to the number of unique digit combinations that yield pentomino solutions.

It's fascinating to explore the intersection of mathematics, shapes, and music in this way, creating a unique auditory experience based on the properties of the pentomino puzzles.

{| class="wikitable"
|pentomino ID
|Name Golomb
|Name

Conway
|note
|sound
|-
|1
|L
|Q
|C
|
|-
|2
|I
|O
|C
|sharp
|-
|3
|V
|V
|D
|
|-
|4
|T
|T
|D
|sharp
|-
|5
|X
|X
|E
|
|-
|6
|F
|R
|F
|
|-
|7
|Z
|Z
|F
|sharp
|-
|8
|N
|S
|G
|
|-
|9
|W
|W
|G
|sharp
|-
|10
|U
|U
|A
|
|-
|11
|Y
|Y
|A
|sharp
|-
|12
|P
|P
|B
|
|}

== Songs ==
It is possible to compose songs using combinations of sounds.

1) In total there are 35 songs

2) There are no songs for [https://en.wikipedia.org/wiki/Dragon_(zodiac) Dragon] + [https://en.wikipedia.org/wiki/Leo_(astrology) Leo]

3) For Earth + North there are two songs only from [https://en.wikipedia.org/wiki/Tiger_(zodiac) Tiger] + [https://en.wikipedia.org/wiki/Gemini_(astrology) Gemini] and [https://en.wikipedia.org/wiki/Rooster_(zodiac) Rooster] + [https://en.wikipedia.org/wiki/Capricorn_(astrology) Capricornus]

{| class="wikitable"
|Size
|
|
|[https://en.wikipedia.org/wiki/Classical_element Classical Element]
|[https://en.wikipedia.org/wiki/Cardinal_direction Cardinal Direction]
|[https://en.wikipedia.org/wiki/Chinese_Zodiac Chinese Zodiac]
|[https://en.wikipedia.org/wiki/Zodiac Zodiac]
|YouTube Playlist
|-
|6×10
|1
|1
|Fire
|East
|[https://en.wikipedia.org/wiki/Rat_(zodiac) Rat]
|[https://en.wikipedia.org/wiki/Aries_(astrology) Aries]
|[https://www.youtube.com/watch?v=scvCplEnsXM&list=PLpIiPuYyqNx4r5NMcbut7FkPOcDtEJGFP NFT PentoCoin #1 5 4 6 8 9 2 10 7 3 12 11]
|-
|6×10
|1
|2
|Fire
|East
|[https://en.wikipedia.org/wiki/Ox_(zodiac) Ox]
|[https://en.wikipedia.org/wiki/Taurus_(astrology) Taurus]
|To Be Created
|-
|6×10
|1
|3
|Fire
|East
|[https://en.wikipedia.org/wiki/Tiger_(zodiac) Tiger]
|[https://en.wikipedia.org/wiki/Gemini_(astrology) Gemini]
|To Be Created
|-
|6×10
|1
|4
|Fire
|East
|[https://en.wikipedia.org/wiki/Rabbit_(zodiac) Rabbit]
|[https://en.wikipedia.org/wiki/Cancer_(astrology) Cancer]
|To Be Created
|-
|6×10
|1
|6
|Fire
|East
|[https://en.wikipedia.org/wiki/Snake_(zodiac) Snake]
|[https://en.wikipedia.org/wiki/Virgo_(astrology) Virgo]
|To Be Created
|-
|6×10
|1
|7
|Fire
|East
|[https://en.wikipedia.org/wiki/Horse_(zodiac) Horse]
|[https://en.wikipedia.org/wiki/Libra_(astrology) Libra]
|To Be Created
|-
|6×10
|1
|8
|Fire
|East
|[https://en.wikipedia.org/wiki/Goat_(zodiac) Goat]
|[https://en.wikipedia.org/wiki/Scorpio_(astrology) Scorpio]
|To Be Created
|-
|6×10
|1
|9
|Fire
|East
|[https://en.wikipedia.org/wiki/Monkey_(zodiac) Monkey]
|[https://en.wikipedia.org/wiki/Sagittarius_(astrology) Sagittarius]
|To Be Created
|-
|6×10
|1
|10
|Fire
|East
|[https://en.wikipedia.org/wiki/Rooster_(zodiac) Rooster]
|[https://en.wikipedia.org/wiki/Capricorn_(astrology) Capricornus]
|To Be Created
|-
|6×10
|1
|11
|Fire
|East
|[https://en.wikipedia.org/wiki/Dog_(zodiac) Dog]
|[https://en.wikipedia.org/wiki/Aquarius_(astrology) Aquarius]
|To Be Created
|-
|6×10
|1
|12
|Fire
|East
|[https://en.wikipedia.org/wiki/Pig_(zodiac) Pig]
|[https://en.wikipedia.org/wiki/Pisces_(astrology) Pisces]
|To Be Created
|-
|5×12
|2
|1
|Water
|South
|[https://en.wikipedia.org/wiki/Rat_(zodiac) Rat]
|[https://en.wikipedia.org/wiki/Aries_(astrology) Aries]
|To Be Created
|-
|5×12
|2
|2
|Water
|South
|[https://en.wikipedia.org/wiki/Ox_(zodiac) Ox]
|[https://en.wikipedia.org/wiki/Taurus_(astrology) Taurus]
|To Be Created
|-
|5×12
|2
|3
|Water
|South
|[https://en.wikipedia.org/wiki/Tiger_(zodiac) Tiger]
|[https://en.wikipedia.org/wiki/Gemini_(astrology) Gemini]
|To Be Created
|-
|5×12
|2
|4
|Water
|South
|[https://en.wikipedia.org/wiki/Rabbit_(zodiac) Rabbit]
|[https://en.wikipedia.org/wiki/Cancer_(astrology) Cancer]]
|To Be Created
|-
|5×12
|2
|6
|Water
|South
|[https://en.wikipedia.org/wiki/Snake_(zodiac) Snake]
|[https://en.wikipedia.org/wiki/Virgo_(astrology) Virgo]
|To Be Created
|-
|5×12
|2
|7
|Water
|South
|[https://en.wikipedia.org/wiki/Horse_(zodiac) Horse]
|https://en.wikipedia.org/wiki/Libra_(astrology) Libra]
|To Be Created
|-
|5×12
|2
|8
|Water
|South
|[https://en.wikipedia.org/wiki/Goat_(zodiac) Goat]
|[https://en.wikipedia.org/wiki/Scorpio_(astrology) Scorpio]
|To Be Created
|-
|5×12
|2
|9
|Water
|South
|[https://en.wikipedia.org/wiki/Monkey_(zodiac) Monkey]
|[https://en.wikipedia.org/wiki/Sagittarius_(astrology) Sagittarius]
|To Be Created
|-
|5×12
|2
|10
|Water
|South
|[https://en.wikipedia.org/wiki/Rooster_(zodiac) Rooster]
|[https://en.wikipedia.org/wiki/Capricorn_(astrology) Capricornus]
|To Be Created
|-
|5×12
|2
|11
|Water
|South
|[https://en.wikipedia.org/wiki/Dog_(zodiac) Dog]
|[https://en.wikipedia.org/wiki/Aquarius_(astrology) Aquarius]
|To Be Created
|-
|5×12
|2
|12
|Water
|South
|[https://en.wikipedia.org/wiki/Pig_(zodiac) Pig]
|[https://en.wikipedia.org/wiki/Pisces_(astrology) Pisces]
|To Be Created
|-
|4×15
|3
|1
|Air
|West
|[https://en.wikipedia.org/wiki/Rat_(zodiac) Rat]
|[https://en.wikipedia.org/wiki/Aries_(astrology) Aries]
|To Be Created
|-
|4×15
|3
|2
|Air
|West
|[https://en.wikipedia.org/wiki/Ox_(zodiac) Ox]
|[https://en.wikipedia.org/wiki/Taurus_(astrology) Taurus]
|To Be Created
|-
|4×15
|3
|3
|Air
|West
|[https://en.wikipedia.org/wiki/Tiger_(zodiac) Tiger]
|[https://en.wikipedia.org/wiki/Gemini_(astrology) Gemini]
|To Be Created
|-
|4×15
|3
|4
|Air
|West
|[https://en.wikipedia.org/wiki/Rabbit_(zodiac) Rabbit]
|[https://en.wikipedia.org/wiki/Cancer_(astrology) Cancer]]
|To Be Created
|-
|4×15
|3
|6
|Air
|West
|[https://en.wikipedia.org/wiki/Snake_(zodiac) Snake]
|[https://en.wikipedia.org/wiki/Virgo_(astrology) Virgo]
|To Be Created
|-
|4×15
|3
|7
|Air
|West
|[https://en.wikipedia.org/wiki/Horse_(zodiac) Horse]
|[https://en.wikipedia.org/wiki/Libra_(astrology) Libra]
|To Be Created
|-
|4×15
|3
|8
|Air
|West
|[https://en.wikipedia.org/wiki/Goat_(zodiac) Goat]
|[https://en.wikipedia.org/wiki/Scorpio_(astrology) Scorpio]
|To Be Created
|-
|4×15
|3
|9
|Air
|West
|[https://en.wikipedia.org/wiki/Monkey_(zodiac) Monkey]
|[https://en.wikipedia.org/wiki/Sagittarius_(astrology) Sagittarius]
|To Be Created
|-
|4×15
|3
|10
|Air
|West
|[https://en.wikipedia.org/wiki/Rooster_(zodiac) Rooster]
|[https://en.wikipedia.org/wiki/Capricorn_(astrology) Capricornus]
|To Be Created
|-
|4×15
|3
|11
|Air
|West
|[https://en.wikipedia.org/wiki/Dog_(zodiac) Dog]
|[https://en.wikipedia.org/wiki/Aquarius_(astrology) Aquarius]
|To Be Created
|-
|4×15
|3
|12
|Air
|West
|[https://en.wikipedia.org/wiki/Pig_(zodiac) Pig]
|[https://en.wikipedia.org/wiki/Pisces_(astrology) Pisces]
|To Be Created
|-
|3×20
|4
|3
|Earth
|North
|[https://en.wikipedia.org/wiki/Tiger_(zodiac) Tiger]
|[https://en.wikipedia.org/wiki/Gemini_(astrology) Gemini]
|To Be Created
|-
|3×20
|4
|10
|Earth
|North
|[https://en.wikipedia.org/wiki/Rooster_(zodiac) Rooster]
|[https://en.wikipedia.org/wiki/Capricorn_(astrology) Capricornus]
|To Be Created
|}

== Price Calculation ==
{| class="wikitable"
|Size
|sibling
|Price, ETH
|Quantity
|Amount, ETH
|-
|6×10
|1
|1000
|8336
|8336000
|-
|6×10
|2
|2000
|907
|1814000
|-
|6×10
|3
|3000
|39
|117000
|-
|6×10
|4
|4000
|40
|160000
|-
|6×10
|5
|5000
|10
|50000
|-
|6×10
|6
|6000
|24
|144000
|-
|5×12
|1
|10000
|3737
|37370000
|-
|5×12
|2
|20000
|291
|5820000
|-
|5×12
|3
|30000
|12
|360000
|-
|4×15
|1
|100000
|1412
|141200000
|-
|4×15
|2
|200000
|48
|9600000
|-
|4×15
|3
|300000
|12
|3600000
|-
|3×20
|1
|1000000
|8
|8000000
|-
|Total
|
|
|14876
|216571000
|}

== See also ==
* [https://en.wikipedia.org/wiki/Pentomino Pentomino]
* [https://en.wikipedia.org/wiki/Classical_element Classical Element]
* [https://en.wikipedia.org/wiki/Cardinal_direction Cardinal Direction]
* [https://en.wikipedia.org/wiki/Chinese_Zodiac Chinese Zodiac]
* [https://en.wikipedia.org/wiki/Zodiac Zodiac]
* [https://en.wikipedia.org/wiki/OpenSea OpenSea]]

== References ==
{{reflist|2}}

==External links==
* [https://t.me/pentocoin/ NFT PentoCoin website]
* [https://opensea.io/collection/pentocoin NFT PentoCoin on OpenSea]
* [https://twitter.com/pentocoin/ NFT PentoCoin on [[Twitter]]]
* [https://www.youtube.com/@pentocoin/ NFT PentoCoin on [[YouTube]]]

[[Category:Non-fungible tokens]]
[[Category:Cryptocurrencies]]
[[Category:Mathematical games]]
[[Category:Polyforms]]

PentoCoin - Revision history

mh:wikigenius>OtondoNnna at 04:09, 2 December 2024

mh:wikigenius>OtondoNnna: PCoin