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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Alphabetic Numbers
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Connect Four
Continued Fractions
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
Gray Code Encoder
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Taxicab Numbers
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Chess960 Decoder
Chess960 Encoder
Crossword
CSS Colors (Inverse)
CSS Grid
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
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Semiprime Numbers
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Snake
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Turtle
Tutorial
Ulam Sequence
Hole
Golfer
Chars
Time
Submitted
Roman to Arabic
snoozingnewt
71
455ms
11 Mar 2026
Roman to Arabic
dokutan
74
574ms
14 Feb 2026
Roman to Arabic
CornerMercury
70
468ms
17 Dec 2025
Roman to Arabic
CaedenHarper
87
601ms
8 Dec 2025
Roman to Arabic
TheZwierzLF
131
692ms
24 Nov 2025
Roman to Arabic
Babafaba
71
478ms
6 Nov 2025
Roman to Arabic
commandz0
114
514ms
1 Sep 2025
Roman to Arabic
albanian-laundromat
88
423ms
9 Aug 2025
Roman to Arabic
sean-niemann
🥇
69
587ms
28 Jun 2025
Roman to Arabic
BREMAUCY
156
741ms
10 Mar 2025
Roman to Arabic
GolfingSuccess
🥇
69
544ms
1 Mar 2025
Roman to Arabic
JunkIce
117
668ms
3 Dec 2024
Roman to Arabic
lifthrasiir
79
500ms
2 Dec 2024
Roman to Arabic
Jacob385
91
488ms
13 Nov 2024
Roman to Arabic
KatieLG
75
530ms
28 Oct 2024
Roman to Arabic
kg583
70
487ms
1 Oct 2024
Roman to Arabic
emgordon154
93
473ms
24 Sep 2024
Roman to Arabic
duckyluuk
74
430ms
28 Aug 2024
Roman to Arabic
GrayJoKing
74
535ms
23 Jul 2024
Roman to Arabic
pardouin
🥇
69
508ms
11 Jul 2024
Roman to Arabic
Stockoh
131
657ms
24 Jun 2024
Roman to Arabic
Yewzir
75
478ms
10 Jun 2024
Roman to Arabic
HumanoidCPU
103
570ms
7 Jun 2024
Roman to Arabic
DialFrost
90
518ms
4 Jun 2024
Roman to Arabic
MeWhenI
89
530ms
24 May 2024
Roman to Arabic
ndren
90
555ms
5 May 2024
Roman to Arabic
m-tkach
88
476ms
31 Jan 2024
Roman to Arabic
ovs-code
88
702ms
27 Jan 2024
Roman to Arabic
xsot
87
657ms
25 Jan 2024
Roman to Arabic
inventshah
88
453ms
22 Jan 2024
Roman to Arabic
AlephSquirrel
91
657ms
21 Jan 2024
Roman to Arabic
JayXon
🥇
69
668ms
21 Jan 2024
Roman to Arabic
SirBogman
101
802ms
20 Jan 2024
Roman to Arabic
msbranicky
212
836ms
17 Jan 2024
Roman to Arabic
sisyphus-ppcg
89
605ms
16 Jan 2024
Roman to Arabic
Steffan153
🥇
69
425ms
16 Jan 2024
Roman to Arabic
Lydxn
🥇
69
555ms
16 Jan 2024
Roman to Arabic
neel11235813
72
604ms
16 Jan 2024
Roman to Arabic
Shanethegamer
74
614ms
16 Jan 2024