Card Number Validation in all languages in chars. 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 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 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 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 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 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 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 600th yokasuretsu 538 120 11ms 26 Jan 2025 600th Troon 538 120 10ms 17 Feb 2025 603rd BREMAUCY 🇫🇷 534 121 16ms 18 Jul 2025 604th kmathis22 533 175 359ms 58 mins ago 605th deancureton 532 121 10ms 30 Dec 2024 606th msbranicky 532 175 162ms 13 Dec 2024 607th chartung17 529 122 10ms 24 Mar 2025 608th msbranicky 527 126 2,985ms 9 Jan 2025 609th msbranicky 525 123 15ms 3 Oct 2024 609th bobbysq 525 123 9ms 5 Oct 2024 609th wuzekai518 525 123 9ms 8 Oct 2024 609th vhoulbreque 🇫🇷 525 123 9ms 4 Feb 2025 613th Macweese 524 178 308ms 3 Aug 2025 614th galloj 🇨🇿 522 112 27ms 4 Oct 2024 615th NotEvenIndian 521 124 10ms 22 Oct 2024 615th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 615th CommandLeo 🇮🇹 521 124 10ms 5 Oct 2025 618th snoozingnewt 🇺🇸 519 213 119ms 15 days ago 619th bac0id 518 180 306ms 9 Jan 2025 620th bnic24 516 125 17ms 3 Oct 2024 620th adoxography 516 125 10ms 22 Oct 2024 620th lelbal 516 125 10ms 14 Oct 2025 623rd sidok 515 109 276ms 13 Nov 2024 624th dokutan 512 143 128ms 19 Oct 2024 625th emgordon154 511 156 10ms 13 Dec 2024 626th nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 627th yoshykai 510 183 309ms 12 Apr 2025 628th KatieLG 🇬🇧 509 140 380ms 1 Oct 2024 629th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 630th CatsAreFluffy 508 127 16ms 30 Oct 2024 630th WillowWispy 508 127 9ms 25 May 2025 632nd Chinay-Domitrix 🇺🇸 507 131 3,429ms 30 Mar 2025 633rd msbranicky 507 138 3ms 3 Oct 2024 634th Lv0Sys 🇵🇱 504 128 18ms 15 Jun 2025 635th ethanlally 504 185 326ms 3 days ago 636th snoozingnewt 🇺🇸 501 142 396ms 15 days ago 637th madex 🇩🇪 500 129 16ms 2 Oct 2024 637th RedzGoose 🇦🇺 500 129 10ms 15 Oct 2024 637th calebaitken 500 129 9ms 11 Apr 2025 640th MeWhenI 🇻🇦 499 149 43ms 4 Oct 2024 641st janAkali 🇷🇺 499 167 335ms 8 Oct 2024 642nd jlangvand 498 141 1ms 15 Oct 2024 642nd HumanoidCPU 498 141 2ms 7 Mar 2025 644th Europe2048 497 130 10ms 2 Oct 2024 644th nstearns96 🇬🇧 497 130 16ms 2 Oct 2024 644th rollershutter 497 130 10ms 10 Jan 2025 644th Stockoh 🇫🇷 497 130 16ms 4 Jul 2025 648th inverseLorentz 🇦🇺 493 131 9ms 7 Oct 2024 648th sciencejiho 493 131 16ms 11 Feb 2025 648th Jaydosu 493 131 9ms 11 Apr 2025 648th Emutis 🇱🇹 493 131 10ms 6 days ago 652nd TheRealOhead 🇺🇸 491 131 13ms 1 Oct 2024 653rd HumanoidCPU 491 145 427ms 5 Oct 2024 654th snoozingnewt 🇺🇸 488 150 135ms 15 days ago 655th snoozingnewt 🇺🇸 486 117 1,024ms 15 days ago 656th Mabeloid 🇳🇴 485 133 10ms 2 Oct 2024 657th h-hh-hhh 🇺🇦 485 177 60ms 2 Nov 2024 658th snoozingnewt 🇺🇸 484 168 105ms 15 days ago 659th snoozingnewt 🇺🇸 483 249 27ms 15 days ago 660th snoozingnewt 🇺🇸 482 173 353ms 15 days ago 661st alphafalfa 480 92 2ms 8 Nov 2024 662nd KatieLG 🇬🇧 478 120 585ms 1 Oct 2024 663rd ravnskjaer 🇩🇰 478 195 306ms 20 Dec 2024 663rd snoozingnewt 🇺🇸 478 195 370ms 15 days ago 665th h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 666th mitzal 477 180 58ms 9 Feb 2025 667th sciencedjinn 475 136 9ms 8 Nov 2024 667th ihatethefrench 475 136 17ms 4 Jan 2025 669th MiffOttah 475 150 402ms 6 Oct 2024 670th kurkale6ka 471 137 21ms 16 Oct 2024 670th 4ndyJ 🇬🇧 471 137 10ms 14 Nov 2024 670th Mikey-Beep 🇬🇧 471 137 16ms 6 Aug 2025 670th wobblybits 471 137 17ms 17 Aug 2025 674th luca1339 471 198 302ms 4 Nov 2024 675th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 First Prev 601–675 of 816 Next Last