Card Number Validation in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc All Holes 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 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 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 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 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 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 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 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 676th dokutan 506 116 1,025ms 30 Aug 2025 677th ThatAlo 504 158 12ms 9 Dec 2024 678th albanian-laundromat 501 88 2ms 2 Jul 2025 679th MeWhenI 🇻🇦 499 149 45ms 4 Oct 2024 680th CheeseCake628 🇳🇴 498 160 98ms 5 Nov 2024 681st Mabeloid 🇳🇴 497 133 549ms 2 Oct 2024 682nd jlangvand 497 141 1ms 15 Oct 2024 682nd HumanoidCPU 497 141 2ms 7 Mar 2025 684th janAkali 🇷🇺 497 167 372ms 8 Oct 2024 685th pres-abhisheksinha 495 161 11ms 8 Oct 2024 686th TheRealOhead 🇺🇸 491 131 10ms 1 Oct 2024 687th ibixina 491 162 11ms 13 Oct 2024 687th TheAtrossian 491 162 11ms 5 Jan 2025 689th HumanoidCPU 490 145 427ms 5 Oct 2024 690th JunkIce 486 136 560ms 3 Dec 2024 691st h-hh-hhh 🇺🇦 485 177 69ms 2 Nov 2024 692nd Vaekor 483 165 12ms 15 Dec 2024 693rd alphafalfa 479 92 2ms 8 Nov 2024 694th h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 695th mitzal 477 180 65ms 9 Feb 2025 696th ravnskjaer 🇩🇰 475 195 410ms 20 Dec 2024 697th MiffOttah 473 150 402ms 6 Oct 2024 698th JesseNoEyes 🇺🇸 471 169 13ms 1 Oct 2024 699th Maximizer02 471 201 11ms 1 Oct 2024 700th iczelia 🇩🇪 469 94 3ms 23 Sep 2025 701st ejini6969 468 102 35ms 14 Jun 2025 702nd zyc-2024 🇨🇳 468 170 10ms 5 Oct 2024 703rd luca1339 468 198 395ms 4 Nov 2024 704th ComputerKWasTaken 🇺🇸 466 171 11ms 14 Oct 2024 705th Yewzir 🇧🇪 460 171 15ms 26 Dec 2024 706th navier-1 460 173 10ms 22 Sep 2025 707th madex 🇩🇪 459 104 36ms 2 Oct 2024 708th Jacob385 459 202 436ms 2 Oct 2024 709th clayboll99 452 176 14ms 10 Jul 2025 710th dokutan 451 63 4ms 26 Nov 2024 711th Upload-and-View 🇺🇦 450 177 19ms 9 Aug 2025 712th IISResetMe 449 104 494ms 27 Mar 2025 713th varhammer 🇷🇺 448 223 12ms 23 Feb 2025 714th OSYCh314 🇦🇺 447 178 10ms 2 Nov 2024 715th dokutan 445 109 10ms 19 Oct 2024 716th grey0ut 444 105 368ms 11 Jan 2025 717th calum12345 442 180 11ms 26 Mar 2025 718th MyXoToD 🇩🇪 440 146 10ms 26 May 2025 719th CheeseCake628 🇳🇴 438 151 453ms 5 days ago 720th zt14427 437 182 11ms 27 Dec 2024 721st IoLimmer 435 183 16ms 10 Oct 2024 722nd aksyristos 433 184 17ms 15 Nov 2024 723rd KatieLG 🇬🇧 432 183 2ms 20 days ago 724th KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 725th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 726th dokutan 424 132 307ms 3 Oct 2024 727th MeWhenI 🇻🇦 417 143 7ms 2 Oct 2024 728th Arkadios200 413 196 120ms 2 days ago 729th dieggsy 405 247 21ms 10 Oct 2024 730th Mabeloid 🇳🇴 404 159 10ms 12 Oct 2024 731st Ralac07 🇦🇺 397 162 10ms 3 Oct 2024 732nd fischfood 383 176 4ms 22 Oct 2024 733rd c0d3-4-F00d 🇩🇪 381 184 2ms 9 Jan 2025 734th ehulinsky 🇺🇸 378 158 6ms 2 Apr 2025 735th RobGLambert 370 232 1,004ms 8 Jun 2025 736th RedzGoose 🇦🇺 369 187 116ms 2 Oct 2024 737th P1nk-P0nk 367 215 3ms 18 Oct 2024 738th gautambp 365 218 11ms 24 Jun 2025 739th sciencejiho 356 197 2ms 11 Feb 2025 740th The-Wolfson 352 230 114ms 16 Dec 2024 741st Zhenyu-Bo 349 228 11ms 30 Jul 2025 742nd EthanJantz 346 230 11ms 5 Sep 2025 743rd RobGLambert 340 273 189ms 8 Jun 2025 744th Ernest1338 338 275 279ms 26 Oct 2024 745th noahhorlacher 337 191 10ms 7 Dec 2024 746th RobertBurs 336 237 10ms 22 Sep 2025 747th TJK-S 328 243 11ms 14 days ago 748th te-chnical 309 258 202ms 4 May 2025 749th KatieLG 🇬🇧 296 290 2,227ms 22 days ago 750th KatieLG 🇬🇧 291 241 2ms 22 days ago First Prev 676–750 of 783 Next Last