The Calendar hole will go live in approximately 3 days. Why not try and solve it ahead of time?
√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 881st TheRealOhead 🇺🇸 707 71 26ms 31 Mar 2023 881st Protothor 707 71 20ms 9 Jul 2025 881st iczelia 🇩🇪 707 71 20ms 10 Oct 2025 884th LHLaurini 🇧🇷 706 84 119ms 5 Jul 2024 885th JunkIce 704 65 364ms 13 Mar 2025 886th ovs-code 🇩🇪 703 104 99ms 13 Oct 2022 886th MeWhenI 🇻🇦 703 104 161ms 14 Oct 2022 888th retrohun 702 846 32ms 4 Jan 2023 889th yzhs 🇩🇪 701 50 163ms 21 Jun 2022 889th Andriamanitra 🇫🇮 701 50 168ms 23 Sep 2022 891st jmhowl 697 69 11ms 19 Jan 2020 891st cmdrsabre 697 69 11ms 30 Jan 2020 891st artyom-razinov 697 69 12ms 13 Feb 2020 891st HemangRajvanshy 697 69 12ms 1 Apr 2020 891st msrawson 697 69 12ms 14 May 2020 891st PyPylia 🇦🇺 697 69 11ms 7 Aug 2020 891st billylanchantin 697 69 12ms 23 Aug 2020 891st magnickolas 697 69 13ms 29 Aug 2020 891st WillowBee7 697 69 11ms 28 Sep 2020 891st ralsei 697 69 11ms 6 Oct 2020 891st jdrouvin 697 69 12ms 2 Dec 2020 891st befoster 697 69 9ms 10 Apr 2021 891st StHagel 697 69 12ms 7 May 2021 891st 8Bit1Byte 697 69 12ms 20 Jun 2021 891st Fmbalbuena 697 69 12ms 17 Sep 2021 891st Ted-Barrett 🇦🇺 697 69 11ms 29 Sep 2021 891st forlack 697 69 11ms 8 Nov 2021 891st shibacho 🇯🇵 697 69 12ms 27 Nov 2021 891st pecholsjones 697 69 12ms 12 Dec 2021 891st CuboidRaptor 🇨🇦 697 69 12ms 3 Apr 2022 891st MakkCH 697 69 11ms 24 Apr 2022 891st CarsonChr 🇺🇸 697 69 12ms 18 Sep 2022 891st bonevbs 697 69 12ms 20 Nov 2022 891st KevinLyvers 697 69 12ms 13 Dec 2022 891st jtaxen 697 69 12ms 4 Jan 2023 891st SucukMitEi 697 69 12ms 7 Jan 2023 891st atazzam 🇺🇸 697 69 12ms 5 Mar 2023 891st DrPiranoid 697 69 12ms 26 Mar 2023 891st Hortaros 697 69 11ms 15 Apr 2023 891st willdaspit 697 69 11ms 4 Aug 2023 891st XioR112 🇵🇱 697 69 13ms 29 Aug 2023 891st jameswmccarty 697 69 12ms 6 Jun 2024 891st dtbao20 🇻🇳 697 69 12ms 8 Oct 2024 891st sciencedjinn 697 69 12ms 8 Nov 2024 891st Unknownuserfrommars 697 69 13ms 21 Nov 2024 891st yokasuretsu 697 69 9ms 31 Dec 2024 891st clayboll99 697 69 12ms 10 Jul 2025 891st webmiche 697 69 12ms 3 Nov 2025 929th janbehrens 🇩🇪 697 72 41ms 30 Dec 2023 929th emgordon154 697 72 78ms 4 Aug 2024 931st annaproxy 696 49 80ms 27 Aug 2022 931st croc54 696 49 36ms 10 Dec 2024 933rd SmartK8 🇨🇿 695 122 421ms 1 Nov 2022 933rd tomh1012 695 122 403ms 8 Sep 2025 935th duckyluuk 🇳🇱 694 90 493ms 25 Sep 2025 936th yzhs 🇩🇪 690 86 114ms 24 Jul 2021 936th strout 690 86 106ms 26 Aug 2022 938th petar-donchev 687 70 46ms 1 Sep 2019 938th cubed-guy 687 70 53ms 20 Sep 2021 938th kenny14231 687 70 11ms 9 Oct 2021 938th GioacchinoGT02 687 70 12ms 3 Dec 2024 942nd m-tkach 🇺🇦 687 259 60ms 27 Jun 2022 943rd juliansiebert 🇩🇪 686 68 241ms 3 Aug 2022 944th MeWhenI 🇻🇦 686 232 41ms 6 Jun 2023 945th Shanethegamer 🇺🇸 685 111 478ms 5 Mar 2022 946th aliakseikalosha 684 124 480ms 17 Oct 2024 946th Soyo-Wind 684 124 417ms 6 Nov 2025 948th Steffan153 🇫🇮 679 52 41ms 29 Aug 2024 949th primo-ppcg 🇹🇭 679 196 2,158ms 3 Feb 2022 950th teddyward 678 71 12ms 9 Jan 2021 950th xkacer 🇨🇿 678 71 12ms 25 Jan 2021 950th sadfun 678 71 12ms 29 Jan 2021 950th ArmaanAS 678 71 9ms 24 Mar 2021 950th classAndrew 678 71 12ms 1 Aug 2021 950th SpareManiKatti 678 71 9ms 10 Sep 2021 950th JGDoerrer 678 71 11ms 22 Jan 2022 950th lovernj 678 71 12ms 7 Feb 2022 950th elephantpanda 678 71 9ms 31 Aug 2022 950th sandorstormen 678 71 12ms 25 Nov 2022 950th Vinterion 678 71 11ms 24 Jul 2023 First Prev 881–960 of 2,818 Next Last
