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 bytes. 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 Bytes Time Submitted 480th dal548 768 67 17ms 12 Jun 2024 480th CutSandstone 768 67 36ms 4 Jul 2024 480th jiaminglimjm 🇲🇾 768 67 26ms 5 Jul 2024 484th MeWhenI 🇻🇦 768 107 110ms 1 Aug 2023 485th SirBogman 🇺🇸 766 52 318ms 4 Aug 2023 485th bitsandbeyond 🇳🇱 766 52 1,380ms 5 Nov 2025 487th eprovst 🇧🇪 764 37 69ms 16 Sep 2025 488th alexsave 764 66 22ms 16 Nov 2025 489th edsrzf 🇳🇿 761 108 114ms 29 Apr 2025 490th primo-ppcg 🇹🇭 760 48 93ms 1 Aug 2023 490th JayXon 🇺🇸 760 48 100ms 1 Aug 2023 490th emgordon154 760 48 48ms 20 Sep 2025 493rd stefangimmillaro 760 87 4,334ms 19 Nov 2024 494th setop 757 68 18ms 18 Aug 2023 494th levavft 757 68 94ms 27 Oct 2023 496th GrayJoKing 🇦🇺 753 148 90ms 27 Feb 2024 497th SirBogman 🇺🇸 752 130 6ms 1 Aug 2023 498th MeWhenI 🇻🇦 751 53 323ms 14 Jul 2024 499th CornerMercury 🇬🇧 750 32 87ms 28 Sep 2023 500th snoozingnewt 🇨🇦 749 58 1,281ms 22 Oct 2025 501st inventshah 749 148 2,166ms 23 Jul 2024 502nd m-tkach 🇺🇦 749 210 151ms 17 Dec 2023 503rd emgordon154 747 103 509ms 27 May 2025 504th acotis 747 175 158ms 29 Jun 2025 505th zacjl 746 45 15ms 21 Jan 2025 505th DialFrost 🇸🇬 746 45 17ms 21 Jan 2025 505th primo-ppcg 🇹🇭 746 45 15ms 16 Apr 2025 508th falsidge 746 69 198ms 9 Jul 2024 508th hamilton-bonds 746 69 18ms 9 Sep 2024 510th qwertzguy 🇫🇷 745 66 399ms 25 Mar 2025 511th emgordon154 745 81 92ms 7 Dec 2024 512th sean-niemann 🇺🇸 745 108 2,115ms 3 Jul 2025 513th SirBogman 🇺🇸 744 149 80ms 1 Aug 2023 514th Yax42 🇫🇷 741 122 440ms 22 days ago 515th edsrzf 🇳🇿 736 61 86ms 10 days ago 516th Lv0Sys 🇵🇱 731 69 11ms 10 days ago 517th Herbert00709 🇵🇱 727 33 74ms 5 May 2024 517th lifthrasiir 🇰🇷 727 33 100ms 5 Dec 2024 519th 0dyse 725 53 284ms 7 May 2025 520th davecame 725 71 23ms 12 Oct 2023 520th Pyroan 725 71 17ms 11 Mar 2025 522nd stefangimmillaro 724 55 352ms 5 Aug 2023 523rd two-bad 🇬🇧 721 70 14ms 13 Dec 2023 524th jerrandolph 721 191 567ms 30 Sep 2025 525th DialFrost 🇸🇬 719 92 4,684ms 28 Oct 2024 526th XioR112 🇵🇱 715 72 17ms 29 Aug 2023 526th rollershutter 715 72 17ms 9 Nov 2023 526th Dataen 715 72 17ms 10 Jan 2024 526th Hebelub 715 72 19ms 10 Jan 2024 526th jfallon1997 715 72 19ms 30 Apr 2024 526th pinguicula 715 72 11ms 15 Aug 2024 526th ImpressedByRocks 715 72 176ms 24 May 2025 526th FortuiteMan 🇫🇷 715 72 18ms 28 Sep 2025 534th stefangimmillaro 714 193 276ms 16 Sep 2023 535th tomh1012 712 127 436ms 16 Sep 2025 536th adamnielson42 🇺🇸 705 73 18ms 14 Aug 2023 536th jtaxen 705 73 18ms 17 Mar 2024 536th ei14 705 73 181ms 23 May 2024 536th EnTerr 705 73 18ms 17 Jun 2024 536th kasarino 705 73 96ms 17 days ago 536th YAJUE114514 705 73 10ms 8 days ago 542nd lynn 705 223 209ms 4 Aug 2023 543rd msbranicky 698 55 233ms 12 Jan 2024 544th dokutan 696 74 17ms 31 Dec 2023 545th kg583 🇺🇸 694 87 81ms 25 days ago 546th MeWhenI 🇻🇦 693 171 1,269ms 28 Mar 2025 547th msbranicky 692 199 777ms 31 Aug 2023 548th zakariamouhid 691 73 2,503ms 1 Aug 2023 549th Daniikk1012 690 41 268ms 3 Nov 2025 550th stefangimmillaro 688 190 141ms 4 Jun 2025 551st clemmers 🇺🇸 686 75 18ms 1 Aug 2023 551st aksyristos 686 75 18ms 1 Aug 2023 551st bac0id 686 75 17ms 20 Sep 2023 554th msbranicky 677 76 17ms 3 Aug 2023 554th StHagel 677 76 17ms 3 Aug 2023 554th SniperSmiley 🇺🇸 677 76 18ms 15 Aug 2023 554th RYNO8 677 76 20ms 20 Aug 2023 554th cingulataluke 677 76 17ms 27 Aug 2023 554th keelimeguy 🇺🇸 677 76 17ms 6 Nov 2023 554th epic-programmer-guy 677 76 17ms 31 Dec 2023 First Prev 481–560 of 1,733 Next Last