The Calendar hole will go live in approximately 7 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 476th SeanJxie 766 66 94ms 7 Jan 2024 476th 77Tigers 766 66 94ms 6 Jun 2024 476th guilhem-roy 🇫🇷 766 66 17ms 10 Jul 2024 476th yokasuretsu 766 66 37ms 6 Jan 2025 476th ahmetdemirag 🇨🇾 766 66 17ms 3 Apr 2025 476th elana-teal 766 66 21ms 21 Jun 2025 487th alexsave 765 66 22ms 16 Nov 2025 488th eprovst 🇧🇪 764 37 69ms 16 Sep 2025 489th MeWhenI 🇻🇦 764 149 566ms 7 Nov 2025 490th edsrzf 🇳🇿 761 108 114ms 29 Apr 2025 491st primo-ppcg 🇹🇭 760 48 91ms 1 Aug 2023 491st JayXon 🇺🇸 760 48 87ms 1 Aug 2023 491st emgordon154 760 48 48ms 20 Sep 2025 494th stefangimmillaro 760 87 3,243ms 19 Nov 2024 495th UnderKoen 🇳🇱 757 257 2ms 22 Feb 2024 495th m-tkach 🇺🇦 757 257 3ms 6 Mar 2024 497th inverseLorentz 🇦🇺 754 67 89ms 29 Oct 2023 497th dal548 754 67 17ms 12 Jun 2024 497th CutSandstone 754 67 36ms 4 Jul 2024 497th jiaminglimjm 🇲🇾 754 67 26ms 5 Jul 2024 501st GrayJoKing 🇦🇺 753 148 90ms 27 Feb 2024 502nd SirBogman 🇺🇸 752 130 6ms 1 Aug 2023 503rd MeWhenI 🇻🇦 751 53 323ms 14 Jul 2024 504th CornerMercury 🇬🇧 750 32 68ms 28 Sep 2023 505th inventshah 749 148 1,640ms 23 Jul 2024 506th m-tkach 🇺🇦 749 210 151ms 17 Dec 2023 507th emgordon154 747 103 509ms 27 May 2025 508th acotis 747 175 158ms 29 Jun 2025 509th zacjl 746 45 15ms 21 Jan 2025 509th DialFrost 🇸🇬 746 45 17ms 21 Jan 2025 509th primo-ppcg 🇹🇭 746 45 15ms 16 Apr 2025 512th Yax42 🇫🇷 746 119 440ms 26 Nov 2025 513th emgordon154 745 81 92ms 7 Dec 2024 514th SirBogman 🇺🇸 744 149 68ms 1 Aug 2023 515th setop 743 68 18ms 18 Aug 2023 515th levavft 743 68 94ms 27 Oct 2023 517th edsrzf 🇳🇿 736 61 86ms 15 days ago 518th snoozingnewt 🇨🇦 734 58 1,281ms 22 Oct 2025 519th qwertzguy 🇫🇷 732 66 399ms 25 Mar 2025 520th falsidge 732 69 198ms 9 Jul 2024 520th hamilton-bonds 732 69 18ms 9 Sep 2024 522nd Lv0Sys 🇵🇱 731 69 11ms 15 days ago 523rd SirFireball3521 730 46 907ms 9 Apr 2024 523rd Natanaelel 🇸🇪 730 46 160ms 21 Apr 2025 525th Herbert00709 🇵🇱 727 33 70ms 5 May 2024 525th lifthrasiir 🇰🇷 727 33 67ms 5 Dec 2024 527th 0dyse 725 53 211ms 7 May 2025 528th stefangimmillaro 725 190 286ms 16 Sep 2023 529th stefangimmillaro 724 55 352ms 5 Aug 2023 530th two-bad 🇬🇧 721 70 14ms 13 Dec 2023 531st jerrandolph 721 191 567ms 30 Sep 2025 532nd DialFrost 🇸🇬 719 92 3,643ms 28 Oct 2024 533rd SirBogman 🇺🇸 714 47 942ms 3 Aug 2023 534th davecame 712 71 23ms 12 Oct 2023 534th Pyroan 712 71 17ms 11 Mar 2025 536th lynn 705 223 209ms 4 Aug 2023 537th XioR112 🇵🇱 702 72 17ms 29 Aug 2023 537th rollershutter 702 72 17ms 9 Nov 2023 537th Dataen 702 72 17ms 10 Jan 2024 537th Hebelub 702 72 19ms 10 Jan 2024 537th jfallon1997 702 72 19ms 30 Apr 2024 537th pinguicula 702 72 11ms 15 Aug 2024 537th ImpressedByRocks 702 72 176ms 24 May 2025 537th FortuiteMan 🇫🇷 702 72 18ms 28 Sep 2025 545th tomh1012 699 127 436ms 16 Sep 2025 546th msbranicky 698 55 233ms 12 Jan 2024 547th MeWhenI 🇻🇦 694 87 1,719ms 9 May 2024 547th kg583 🇺🇸 694 87 81ms 23 Nov 2025 549th MeWhenI 🇻🇦 693 171 1,269ms 28 Mar 2025 550th adamnielson42 🇺🇸 692 73 18ms 14 Aug 2023 550th jtaxen 692 73 18ms 17 Mar 2024 550th ei14 692 73 181ms 23 May 2024 550th EnTerr 692 73 18ms 17 Jun 2024 550th kasarino 692 73 96ms 23 days ago 550th YAJUE114514 692 73 10ms 14 days ago 556th msbranicky 692 199 777ms 31 Aug 2023 557th zakariamouhid 691 73 2,503ms 1 Aug 2023 558th Daniikk1012 690 41 268ms 3 Nov 2025 559th stefangimmillaro 688 190 141ms 4 Jun 2025 560th dokutan 685 284 2ms 7 Nov 2025 First Prev 481–560 of 1,716 Next Last