The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
ln 2 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 Numbrix 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 Numbrix 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 478th qwertzguy 🇫🇷 766 66 17ms 9 Aug 2023 478th nstearns96 🇬🇧 766 66 18ms 15 Sep 2023 478th SeanJxie 766 66 94ms 7 Jan 2024 478th 77Tigers 766 66 94ms 6 Jun 2024 478th guilhem-roy 🇫🇷 766 66 17ms 10 Jul 2024 478th yokasuretsu 766 66 37ms 6 Jan 2025 478th ahmetdemirag 🇨🇾 766 66 17ms 3 Apr 2025 478th elana-teal 766 66 21ms 21 Jun 2025 489th eprovst 🇧🇪 764 37 69ms 16 Sep 2025 490th alexsave 764 66 22ms 16 Nov 2025 491st MeWhenI 🇻🇦 764 149 566ms 7 Nov 2025 492nd edsrzf 🇳🇿 761 108 114ms 29 Apr 2025 493rd primo-ppcg 🇹🇭 760 48 93ms 1 Aug 2023 493rd JayXon 🇺🇸 760 48 100ms 1 Aug 2023 493rd emgordon154 760 48 48ms 20 Sep 2025 496th stefangimmillaro 760 87 4,334ms 19 Nov 2024 497th UnderKoen 🇳🇱 757 257 2ms 22 Feb 2024 497th m-tkach 🇺🇦 757 257 3ms 6 Mar 2024 499th inverseLorentz 🇦🇺 754 67 89ms 29 Oct 2023 499th dal548 754 67 17ms 12 Jun 2024 499th CutSandstone 754 67 36ms 4 Jul 2024 499th jiaminglimjm 🇲🇾 754 67 26ms 5 Jul 2024 503rd GrayJoKing 🇦🇺 753 148 90ms 27 Feb 2024 504th SirBogman 🇺🇸 752 130 6ms 1 Aug 2023 505th MeWhenI 🇻🇦 751 53 323ms 14 Jul 2024 506th CornerMercury 🇬🇧 750 32 87ms 28 Sep 2023 507th inventshah 749 148 2,166ms 23 Jul 2024 508th m-tkach 🇺🇦 749 210 151ms 17 Dec 2023 509th emgordon154 747 103 509ms 27 May 2025 510th acotis 747 175 158ms 29 Jun 2025 511th zacjl 746 45 15ms 21 Jan 2025 511th DialFrost 🇸🇬 746 45 17ms 21 Jan 2025 511th primo-ppcg 🇹🇭 746 45 15ms 16 Apr 2025 514th emgordon154 745 81 92ms 7 Dec 2024 515th Yax42 🇫🇷 745 119 440ms 22 days ago 516th SirBogman 🇺🇸 744 149 80ms 1 Aug 2023 517th setop 743 68 18ms 18 Aug 2023 517th levavft 743 68 94ms 27 Oct 2023 519th edsrzf 🇳🇿 736 61 86ms 9 days ago 520th snoozingnewt 🇨🇦 734 58 1,281ms 22 Oct 2025 521st qwertzguy 🇫🇷 732 66 399ms 25 Mar 2025 522nd falsidge 732 69 198ms 9 Jul 2024 522nd hamilton-bonds 732 69 18ms 9 Sep 2024 524th Lv0Sys 🇵🇱 731 69 11ms 10 days ago 525th SirFireball3521 730 46 1,162ms 9 Apr 2024 525th Natanaelel 🇸🇪 730 46 223ms 21 Apr 2025 527th Herbert00709 🇵🇱 727 33 74ms 5 May 2024 527th lifthrasiir 🇰🇷 727 33 100ms 5 Dec 2024 529th 0dyse 725 53 284ms 7 May 2025 530th stefangimmillaro 725 190 286ms 16 Sep 2023 531st stefangimmillaro 724 55 352ms 5 Aug 2023 532nd two-bad 🇬🇧 721 70 14ms 13 Dec 2023 533rd jerrandolph 721 191 567ms 30 Sep 2025 534th DialFrost 🇸🇬 719 92 4,684ms 28 Oct 2024 535th SirBogman 🇺🇸 714 47 1,348ms 3 Aug 2023 536th davecame 712 71 23ms 12 Oct 2023 536th Pyroan 712 71 17ms 11 Mar 2025 538th lynn 705 223 209ms 4 Aug 2023 539th XioR112 🇵🇱 702 72 17ms 29 Aug 2023 539th rollershutter 702 72 17ms 9 Nov 2023 539th Dataen 702 72 17ms 10 Jan 2024 539th Hebelub 702 72 19ms 10 Jan 2024 539th jfallon1997 702 72 19ms 30 Apr 2024 539th pinguicula 702 72 11ms 15 Aug 2024 539th ImpressedByRocks 702 72 176ms 24 May 2025 539th FortuiteMan 🇫🇷 702 72 18ms 28 Sep 2025 547th msbranicky 698 55 233ms 12 Jan 2024 548th tomh1012 698 127 436ms 16 Sep 2025 549th MeWhenI 🇻🇦 694 87 1,719ms 9 May 2024 549th kg583 🇺🇸 694 87 81ms 25 days ago 551st MeWhenI 🇻🇦 693 171 1,269ms 28 Mar 2025 552nd adamnielson42 🇺🇸 692 73 18ms 14 Aug 2023 552nd jtaxen 692 73 18ms 17 Mar 2024 552nd ei14 692 73 181ms 23 May 2024 552nd EnTerr 692 73 18ms 17 Jun 2024 552nd kasarino 692 73 96ms 17 days ago 552nd YAJUE114514 692 73 10ms 8 days ago 558th msbranicky 692 199 777ms 31 Aug 2023 559th zakariamouhid 691 73 2,503ms 1 Aug 2023 560th Daniikk1012 690 41 268ms 3 Nov 2025 First Prev 481–560 of 1,715 Next Last