Card Number Validation in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Minesweeper 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 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 Apéry’s Constant Binary Lambda Calculus Calendar 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 Multitap Input NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 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 Erlang 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 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 Minesweeper 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 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 CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 601st emgordon154 546 52 2ms 3 Nov 2024 602nd zakariamouhid 545 118 9ms 1 Oct 2024 602nd JOrE20 🇺🇸 545 118 9ms 4 days ago 604th xyangst 545 171 171ms 1 Oct 2024 604th kmathis22 545 171 344ms 16 days ago 606th najs91 544 131 343ms 15 Oct 2024 606th bac0id 544 131 370ms 9 Jan 2025 606th CaedenHarper 🇨🇦 544 131 340ms 17 Oct 2025 609th jtaxen 543 119 17ms 21 Oct 2024 609th psbpsbp 543 119 11ms 19 Dec 2024 609th klixel 🇨🇦 543 119 10ms 9 Apr 2025 609th vhoulbreque 🇫🇷 543 119 11ms 14 days ago 613th eranws 541 119 10ms 23 Dec 2024 614th Sciman101 539 147 2ms 26 Mar 2025 615th TaserTheFox 🇺🇸 538 120 17ms 8 Oct 2024 615th yokasuretsu 538 120 11ms 26 Jan 2025 615th Troon 538 120 10ms 17 Feb 2025 618th BREMAUCY 🇫🇷 534 121 17ms 18 Jul 2025 619th msbranicky 533 175 162ms 13 Dec 2024 620th deancureton 532 121 9ms 30 Dec 2024 621st chartung17 529 122 9ms 24 Mar 2025 622nd msbranicky 527 126 2,869ms 9 Jan 2025 623rd msbranicky 525 123 17ms 3 Oct 2024 623rd bobbysq 525 123 10ms 5 Oct 2024 623rd wuzekai518 525 123 10ms 8 Oct 2024 626th Macweese 524 178 308ms 3 Aug 2025 627th galloj 🇨🇿 522 112 19ms 4 Oct 2024 628th NotEvenIndian 521 124 10ms 22 Oct 2024 628th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 628th CommandLeo 🇮🇹 521 124 10ms 5 Oct 2025 631st blaztoma 🇱🇹 519 154 107ms 6 days ago 632nd snoozingnewt 🇨🇦 519 213 119ms 2 Nov 2025 633rd bac0id 518 180 306ms 9 Jan 2025 634th bnic24 517 125 16ms 3 Oct 2024 634th adoxography 517 125 10ms 22 Oct 2024 634th lelbal 517 125 10ms 14 Oct 2025 637th sidok 515 109 247ms 13 Nov 2024 638th dokutan 512 143 128ms 19 Oct 2024 639th emgordon154 511 156 8ms 13 Dec 2024 640th nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 641st yoshykai 510 183 309ms 12 Apr 2025 642nd CatsAreFluffy 509 127 17ms 30 Oct 2024 642nd WillowWispy 509 127 10ms 25 May 2025 644th KatieLG 🇬🇧 509 140 358ms 1 Oct 2024 645th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 646th Chinay-Domitrix 🇺🇸 507 131 2,930ms 30 Mar 2025 647th Lv0Sys 🇵🇱 505 128 16ms 15 Jun 2025 648th madex 🇩🇪 501 129 16ms 2 Oct 2024 648th RedzGoose 🇦🇺 501 129 10ms 15 Oct 2024 648th calebaitken 501 129 9ms 11 Apr 2025 648th rollershutter 501 129 17ms 15 days ago 652nd msbranicky 501 138 3ms 3 Oct 2024 653rd snoozingnewt 🇨🇦 501 142 379ms 2 Nov 2025 654th jlangvand 499 141 1ms 15 Oct 2024 654th HumanoidCPU 499 141 2ms 7 Mar 2025 656th MeWhenI 🇻🇦 499 149 55ms 4 Oct 2024 657th janAkali 🇷🇺 499 167 335ms 8 Oct 2024 658th Europe2048 497 130 9ms 2 Oct 2024 658th nstearns96 🇬🇧 497 130 15ms 2 Oct 2024 658th Stockoh 🇫🇷 497 130 15ms 4 Jul 2025 661st inverseLorentz 🇦🇺 493 131 10ms 7 Oct 2024 661st sciencejiho 493 131 17ms 11 Feb 2025 661st Jaydosu 493 131 10ms 11 Apr 2025 661st Emutis 🇱🇹 493 131 10ms 23 days ago 665th StronkCheese2 493 161 2ms 16 days ago 666th TheRealOhead 🇺🇸 491 131 9ms 1 Oct 2024 667th HumanoidCPU 491 145 388ms 5 Oct 2024 668th snoozingnewt 🇨🇦 488 150 135ms 2 Nov 2025 669th snoozingnewt 🇨🇦 487 249 27ms 2 Nov 2025 670th snoozingnewt 🇨🇦 486 117 940ms 2 Nov 2025 671st Mabeloid 🇳🇴 486 133 10ms 2 Oct 2024 672nd h-hh-hhh 🇺🇦 485 177 59ms 2 Nov 2024 673rd snoozingnewt 🇨🇦 482 173 353ms 2 Nov 2025 674th alphafalfa 480 92 2ms 8 Nov 2024 675th KatieLG 🇬🇧 479 120 479ms 1 Oct 2024 First Prev 601–675 of 835 Next Last