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iogii
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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
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
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)
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
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
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Tutorial
Hole
Golfer
Bytes
Time
Submitted
Collatz
prestosilver
69
253ms
5 Jan 2026
Collatz
KatieLG
2,197
158ms
30 Nov 2025
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88
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blaztoma
61
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70
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55
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74
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3,234
178ms
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antimon2
💎
45
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3,234
155ms
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sidok
75
204ms
15 Sep 2024
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alemelis
54
272ms
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tunasplam
85
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50
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73
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21 Jun 2024
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72
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3,234
165ms
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🥈
48
299ms
6 Mar 2024
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Yewzir
72
277ms
27 Feb 2024
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72
222ms
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stellartux
67
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janbehrens
64
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madeforlosers
73
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ovs-code
50
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DialFrost
51
266ms
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Collatz
wearsunscreen
83
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snoozingnewt
67
276ms
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bciccarelli
71
223ms
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Collatz
davbass
70
238ms
25 Aug 2023
Collatz
aDwarfNamedUrist
75
266ms
12 Jul 2023
Collatz
rollershutter
69
288ms
7 Jul 2023
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Andriamanitra
59
267ms
26 Apr 2023
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devinallen
64
265ms
18 Mar 2023
Collatz
Shanethegamer
52
438ms
9 Mar 2023
Collatz
StronkCheese
87
210ms
18 Feb 2023
Collatz
MeWhenI
61
262ms
15 Feb 2023
Collatz
retrohun
3,234
175ms
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Collatz
Steffan153
50
269ms
10 Dec 2022
Collatz
HopelessSoap
73
216ms
17 Oct 2022
Collatz
jarodlam
64
247ms
7 Oct 2022
Collatz
Codsilla
52
273ms
1 Jul 2022
Collatz
KatieLG-Transpiler
4,280
175ms
23 Jun 2022
Collatz
czylabsonasa
57
268ms
18 Jun 2022
Collatz
rokasveitas
81
218ms
16 May 2022
Collatz
MarcMush
70
273ms
13 May 2022
Collatz
Lydxn
🥈
48
291ms
5 May 2022
Collatz
JayXon
50
279ms
5 May 2022
Collatz
HPWiz
50
265ms
4 May 2022
Collatz
shellbertt
66
298ms
4 May 2022
Collatz
JRaspass
3,237
228ms
4 May 2022