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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
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Arabic to Roman
Arithmetic Numbers
Arrows
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ASCII Table
Billiards
brainfuck
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
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
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
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Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Morse Decoder
Morse Encoder
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
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Poker
Polyominoes
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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)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
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
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Minesweeper
NFA Simulator
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p-adic Expansion
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QR Encoder
Quadratic Formula
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Tutorial
Hole
Golfer
Chars
Time
Submitted
Pernicious Numbers
snoozingnewt
69
5ms
7 days ago
Pernicious Numbers
edsrzf
54
6ms
10 days ago
Pernicious Numbers
Yax42
75
7ms
26 days ago
Pernicious Numbers
pardouin
56
6ms
26 Apr 2025
Pernicious Numbers
DialFrost
57
12ms
20 Mar 2025
Pernicious Numbers
kg583
🥇
50
6ms
1 Mar 2025
Pernicious Numbers
CaedenHarper
108
5ms
24 Jan 2025
Pernicious Numbers
CLOStrophobic
57
6ms
18 Jan 2025
Pernicious Numbers
Mabeloid
108
8ms
3 Oct 2024
Pernicious Numbers
xsot
54
5ms
21 Sep 2024
Pernicious Numbers
dokutan
75
5ms
29 Jul 2024
Pernicious Numbers
HumanoidCPU
108
5ms
10 May 2024
Pernicious Numbers
Yewzir
56
6ms
6 Feb 2024
Pernicious Numbers
Shanethegamer
54
6ms
20 Dec 2023
Pernicious Numbers
varhammer
108
8ms
13 Dec 2023
Pernicious Numbers
Betuaredead
60
6ms
14 Nov 2023
Pernicious Numbers
msbranicky
65
6ms
28 Aug 2023
Pernicious Numbers
syntax-rules
60
6ms
15 May 2023
Pernicious Numbers
rucin93
73
6ms
23 Apr 2023
Pernicious Numbers
primo-ppcg
53
5ms
28 Jan 2023
Pernicious Numbers
AlephSquirrel
🥇
50
6ms
18 Jan 2023
Pernicious Numbers
Steffan153
56
5ms
1 Jan 2023
Pernicious Numbers
retrohun
113
5ms
28 Dec 2022
Pernicious Numbers
MeWhenI
61
6ms
5 Nov 2022
Pernicious Numbers
KatieLG-Transpiler
108
6ms
24 Jun 2022
Pernicious Numbers
Likable-outlieR
137
5ms
4 Apr 2022
Pernicious Numbers
mokymok
113
5ms
11 Nov 2021
Pernicious Numbers
Lydxn
🥇
50
6ms
11 Oct 2021
Pernicious Numbers
KatieLG
108
6ms
10 Oct 2021
Pernicious Numbers
ai-fischer
63
9ms
2 Oct 2021
Pernicious Numbers
c0d3-4-F00d
210
6ms
12 Jun 2021
Pernicious Numbers
marcin7Cd
56
5ms
8 Feb 2021
Pernicious Numbers
eggplants
90
5ms
26 Nov 2020
Pernicious Numbers
somebody1234
88
9ms
20 Nov 2018
Pernicious Numbers
cam-lambda
112
6ms
1 May 2018