The Calendar hole will go live in approximately 12 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 479th MaxElf999 766 66 92ms 3 Aug 2023 479th qwertzguy 🇫🇷 766 66 17ms 9 Aug 2023 479th nstearns96 🇬🇧 766 66 18ms 15 Sep 2023 479th SeanJxie 766 66 94ms 7 Jan 2024 479th 77Tigers 766 66 94ms 6 Jun 2024 479th guilhem-roy 🇫🇷 766 66 17ms 10 Jul 2024 479th yokasuretsu 766 66 37ms 6 Jan 2025 479th ahmetdemirag 🇨🇾 766 66 17ms 3 Apr 2025 479th elana-teal 766 66 21ms 21 Jun 2025 490th eprovst 🇧🇪 764 37 69ms 16 Sep 2025 491st alexsave 764 66 22ms 16 Nov 2025 492nd MeWhenI 🇻🇦 764 149 566ms 7 Nov 2025 493rd edsrzf 🇳🇿 761 108 114ms 29 Apr 2025 494th primo-ppcg 🇹🇭 760 48 93ms 1 Aug 2023 494th JayXon 🇺🇸 760 48 100ms 1 Aug 2023 494th emgordon154 760 48 48ms 20 Sep 2025 497th stefangimmillaro 760 87 4,334ms 19 Nov 2024 498th UnderKoen 🇳🇱 757 257 2ms 22 Feb 2024 498th m-tkach 🇺🇦 757 257 3ms 6 Mar 2024 500th inverseLorentz 🇦🇺 754 67 89ms 29 Oct 2023 500th dal548 754 67 17ms 12 Jun 2024 500th CutSandstone 754 67 36ms 4 Jul 2024 500th jiaminglimjm 🇲🇾 754 67 26ms 5 Jul 2024 504th GrayJoKing 🇦🇺 753 148 90ms 27 Feb 2024 505th SirBogman 🇺🇸 752 130 6ms 1 Aug 2023 506th MeWhenI 🇻🇦 751 53 323ms 14 Jul 2024 507th CornerMercury 🇬🇧 750 32 87ms 28 Sep 2023 508th inventshah 749 148 2,166ms 23 Jul 2024 509th m-tkach 🇺🇦 749 210 151ms 17 Dec 2023 510th emgordon154 747 103 509ms 27 May 2025 511th acotis 747 175 158ms 29 Jun 2025 512th zacjl 746 45 15ms 21 Jan 2025 512th DialFrost 🇸🇬 746 45 17ms 21 Jan 2025 512th primo-ppcg 🇹🇭 746 45 15ms 16 Apr 2025 515th emgordon154 745 81 92ms 7 Dec 2024 516th Yax42 🇫🇷 745 119 440ms 22 days ago 517th SirBogman 🇺🇸 744 149 80ms 1 Aug 2023 518th setop 743 68 18ms 18 Aug 2023 518th levavft 743 68 94ms 27 Oct 2023 520th edsrzf 🇳🇿 736 61 86ms 10 days ago 521st snoozingnewt 🇨🇦 734 58 1,281ms 22 Oct 2025 522nd qwertzguy 🇫🇷 732 66 399ms 25 Mar 2025 523rd falsidge 732 69 198ms 9 Jul 2024 523rd hamilton-bonds 732 69 18ms 9 Sep 2024 525th Lv0Sys 🇵🇱 731 69 11ms 10 days ago 526th SirFireball3521 730 46 1,162ms 9 Apr 2024 526th Natanaelel 🇸🇪 730 46 223ms 21 Apr 2025 528th Herbert00709 🇵🇱 727 33 74ms 5 May 2024 528th lifthrasiir 🇰🇷 727 33 100ms 5 Dec 2024 530th 0dyse 725 53 284ms 7 May 2025 531st stefangimmillaro 725 190 286ms 16 Sep 2023 532nd stefangimmillaro 724 55 352ms 5 Aug 2023 533rd two-bad 🇬🇧 721 70 14ms 13 Dec 2023 534th jerrandolph 721 191 567ms 30 Sep 2025 535th DialFrost 🇸🇬 719 92 4,684ms 28 Oct 2024 536th SirBogman 🇺🇸 714 47 1,348ms 3 Aug 2023 537th davecame 712 71 23ms 12 Oct 2023 537th Pyroan 712 71 17ms 11 Mar 2025 539th lynn 705 223 209ms 4 Aug 2023 540th XioR112 🇵🇱 702 72 17ms 29 Aug 2023 540th rollershutter 702 72 17ms 9 Nov 2023 540th Dataen 702 72 17ms 10 Jan 2024 540th Hebelub 702 72 19ms 10 Jan 2024 540th jfallon1997 702 72 19ms 30 Apr 2024 540th pinguicula 702 72 11ms 15 Aug 2024 540th ImpressedByRocks 702 72 176ms 24 May 2025 540th FortuiteMan 🇫🇷 702 72 18ms 28 Sep 2025 548th msbranicky 698 55 233ms 12 Jan 2024 549th tomh1012 698 127 436ms 16 Sep 2025 550th MeWhenI 🇻🇦 694 87 1,719ms 9 May 2024 550th kg583 🇺🇸 694 87 81ms 26 days ago 552nd MeWhenI 🇻🇦 693 171 1,269ms 28 Mar 2025 553rd adamnielson42 🇺🇸 692 73 18ms 14 Aug 2023 553rd jtaxen 692 73 18ms 17 Mar 2024 553rd ei14 692 73 181ms 23 May 2024 553rd EnTerr 692 73 18ms 17 Jun 2024 553rd kasarino 692 73 96ms 17 days ago 553rd YAJUE114514 692 73 10ms 8 days ago 559th msbranicky 692 199 777ms 31 Aug 2023 560th zakariamouhid 691 73 2,503ms 1 Aug 2023 First Prev 481–560 of 1,716 Next Last