The Calendar hole will go live in approximately 6 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 398th NewDefectus 🇮🇱 830 62 17ms 19 Aug 2023 398th ListeriaM 830 62 19ms 19 Aug 2023 398th btjones0 830 62 18ms 24 Aug 2023 398th Yewzir 🇧🇪 830 62 18ms 24 Oct 2023 398th programjames 830 62 30ms 24 Dec 2023 406th DialFrost 🇸🇬 829 44 65ms 7 Aug 2024 407th Natanaelel 🇸🇪 827 61 24ms 1 Aug 2023 407th dmrichwa 🇺🇸 827 61 18ms 3 Aug 2023 407th GeorgeStechman 🇬🇧 827 61 27ms 19 Oct 2023 407th targrik 827 61 26ms 17 Feb 2025 407th 52525rr 827 61 11ms 9 Sep 2025 412th edsrzf 🇳🇿 827 71 1,315ms 27 Apr 2025 413th SirBogman 🇺🇸 825 47 942ms 3 Aug 2023 414th DialFrost 🇸🇬 820 53 885ms 30 Aug 2025 415th Herbert00709 🇵🇱 820 60 395ms 13 May 2024 416th MeWhenI 🇻🇦 819 63 135ms 3 Aug 2024 417th Mch47 817 63 18ms 28 Oct 2023 417th Lv0Sys 🇵🇱 817 63 25ms 16 days ago 419th sean-niemann 🇺🇸 815 120 22ms 25 Jun 2025 420th FlorianCassayre 🇫🇷 814 62 25ms 4 Jun 2024 420th Nemikolh 🇫🇷 814 62 19ms 6 Nov 2025 422nd ovs-code 🇩🇪 814 71 1,157ms 15 Aug 2023 423rd Steffan153 🇫🇮 813 49 429ms 10 Aug 2024 424th SirBogman 🇺🇸 810 45 54ms 7 Aug 2023 425th inverseLorentz 🇦🇺 810 73 160ms 9 May 2024 426th stefangimmillaro 809 144 440ms 6 Oct 2025 427th Shanethegamer 🇺🇸 807 61 339ms 16 Jan 2024 427th Yewzir 🇧🇪 807 61 335ms 4 Feb 2024 427th albanian-laundromat 807 61 402ms 20 Nov 2025 430th zacjl 806 59 986ms 20 Apr 2025 431st jared-hughes 804 64 11ms 1 Aug 2023 431st OllieBoyne 🇬🇧 804 64 318ms 9 Aug 2023 431st FlorianCassayre 🇫🇷 804 64 94ms 1 Oct 2023 431st davitf 804 64 25ms 21 Nov 2024 431st jatloe 804 64 18ms 17 Mar 2025 431st cros107 🇦🇺 804 64 97ms 16 Sep 2025 437th DialFrost 🇸🇬 804 73 1,367ms 10 Mar 2025 438th Herbert00709 🇵🇱 803 138 70ms 25 Oct 2024 439th albanian-laundromat 801 63 15ms 27 days ago 440th lynn 800 30 701ms 1 Aug 2023 440th AlephSquirrel 800 30 686ms 27 Dec 2023 442nd dokutan 800 48 2,190ms 9 Apr 2024 443rd sean-niemann 🇺🇸 797 139 70ms 25 Jun 2025 444th MeWhenI 🇻🇦 794 74 1,334ms 1 Aug 2023 445th anter69 🇭🇺 793 46 48ms 19 Apr 2024 446th SirFireball3521 792 49 907ms 9 Apr 2024 447th SB-945 792 65 18ms 6 Feb 2024 447th elgan65536 792 65 31ms 5 Mar 2024 447th agreegious 792 65 92ms 16 Mar 2025 450th emgordon154 791 111 312ms 20 days ago 451st DestyNova 🇮🇪 789 79 1,034ms 27 days ago 452nd jared-hughes 789 124 30ms 1 Aug 2023 453rd eranws 788 64 19ms 17 Aug 2023 454th saito-ta 🇯🇵 785 119 2,778ms 29 Nov 2023 454th jared-hughes 785 119 3,160ms 18 Sep 2024 456th MeWhenI 🇻🇦 782 149 566ms 7 Nov 2025 457th AlexanderFair 780 66 33ms 1 Aug 2023 457th jmerle 🇳🇱 780 66 17ms 2 Aug 2023 457th MaxElf999 780 66 92ms 3 Aug 2023 457th qwertzguy 🇫🇷 780 66 17ms 9 Aug 2023 457th nstearns96 🇬🇧 780 66 18ms 15 Sep 2023 457th SeanJxie 780 66 94ms 7 Jan 2024 457th 77Tigers 780 66 94ms 6 Jun 2024 457th guilhem-roy 🇫🇷 780 66 17ms 10 Jul 2024 457th yokasuretsu 780 66 37ms 6 Jan 2025 457th ahmetdemirag 🇨🇾 780 66 17ms 3 Apr 2025 457th elana-teal 780 66 21ms 21 Jun 2025 468th emgordon154 778 85 3,515ms 8 Nov 2024 469th MeWhenI 🇻🇦 777 99 552ms 1 Aug 2023 470th Yax42 🇫🇷 776 65 17ms 8 Sep 2025 471st jared-hughes 775 143 73ms 1 Aug 2023 472nd MeWhenI 🇻🇦 774 31 61ms 1 Aug 2023 472nd SirBogman 🇺🇸 774 31 59ms 1 Aug 2023 474th MeWhenI 🇻🇦 774 58 91ms 5 Apr 2025 475th MeWhenI 🇻🇦 774 76 50ms 14 Feb 2025 476th FortuiteMan 🇫🇷 774 87 36ms 29 Sep 2025 477th emgordon154 770 154 626ms 30 Apr 2025 478th masflam 768 50 287ms 21 Jun 2024 479th inverseLorentz 🇦🇺 768 67 89ms 29 Oct 2023 479th dal548 768 67 17ms 12 Jun 2024 First Prev 401–480 of 1,732 Next Last