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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
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Billiards
brainfuck
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
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Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
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Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
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Fractions
Game of Life
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Happy Numbers (Long)
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Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
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Kolakoski Sequence
Leap Years
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ln 2
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Lucky Tickets
Mahjong
Mandelbrot
Maze
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Morse Encoder
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Niven Numbers (Long)
Number Spiral
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Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
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Pascal’s Triangle
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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
Calendar
Connect Four
Continued Fractions
Crossword
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Highly Composite Numbers
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p-adic Expansion
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Bytes
Time
Submitted
Happy Numbers (Long)
ian-h-chamberlain
127
121ms
5 days ago
Happy Numbers (Long)
CaedenHarper
122
153ms
8 days ago
Happy Numbers (Long)
KatieLG
585
230ms
10 days ago
Happy Numbers (Long)
kumavale
114
227ms
11 Nov 2025
Happy Numbers (Long)
webmiche
145
145ms
3 Nov 2025
Happy Numbers (Long)
Mabeloid
122
151ms
31 Oct 2025
Happy Numbers (Long)
acotis
🥇
109
142ms
28 Oct 2025
Happy Numbers (Long)
snoozingnewt
136
220ms
29 Sep 2025
Happy Numbers (Long)
dokutan
322
160ms
23 Jul 2025
Happy Numbers (Long)
Natanaelel
115
145ms
23 Jul 2025
Happy Numbers (Long)
DialFrost
129
196ms
5 Apr 2025
Happy Numbers (Long)
emgordon154
120
147ms
14 Mar 2025
Happy Numbers (Long)
The3gs
117
200ms
29 Nov 2024
Happy Numbers (Long)
HumanoidCPU
572
174ms
9 May 2024
Happy Numbers (Long)
elgan65536
123
354ms
5 Mar 2024
Happy Numbers (Long)
Yewzir
118
148ms
5 Feb 2024
Happy Numbers (Long)
mousetail
119
189ms
15 Jan 2024
Happy Numbers (Long)
stefangimmillaro
114
215ms
19 Oct 2023
Happy Numbers (Long)
msbranicky
156
206ms
1 Oct 2023
Happy Numbers (Long)
ovs-code
119
212ms
23 Jun 2023
Happy Numbers (Long)
Re-Adventures
124
152ms
22 Jun 2023
Happy Numbers (Long)
klixel
143
188ms
11 May 2023
Happy Numbers (Long)
MeWhenI
120
150ms
9 May 2023
Happy Numbers (Long)
retrohun
572
265ms
27 Dec 2022
Happy Numbers (Long)
jared-hughes
124
167ms
10 Nov 2022
Happy Numbers (Long)
andersk
121
260ms
31 Oct 2022
Happy Numbers (Long)
r-brinke
🥇
109
181ms
29 Jul 2022
Happy Numbers (Long)
KatieLG-Transpiler
717
133ms
24 Jun 2022
Happy Numbers (Long)
JayXon
🥇
109
185ms
23 May 2022
Happy Numbers (Long)
Lydxn
🥇
109
242ms
23 May 2022
Happy Numbers (Long)
scpchicken
137
431ms
19 May 2022
Happy Numbers (Long)
verticallity
172
231ms
6 Apr 2022
Happy Numbers (Long)
lynn
119
228ms
10 Mar 2022
Happy Numbers (Long)
JGDoerrer
148
299ms
5 Feb 2022
Happy Numbers (Long)
Shanethegamer
120
150ms
13 Jan 2022