The Calendar hole will go live in approximately 13 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 401st andersk 🇺🇸 912 65 114ms 21 Mar 2020 401st JayXon 🇺🇸 912 65 117ms 28 Nov 2021 401st btnlq 912 65 126ms 15 Oct 2023 401st ovs-code 🇩🇪 912 65 127ms 31 Jan 2024 405th canissimia 🇦🇶 912 242 237ms 10 Feb 2024 406th FlorianCassayre 🇫🇷 911 100 279ms 19 Jul 2025 407th primo-ppcg 🇹🇭 907 112 9ms 30 Nov 2021 408th sean-niemann 🇺🇸 907 143 445ms 30 Dec 2024 409th ovs-code 🇩🇪 906 69 431ms 24 Sep 2025 409th emgordon154 906 69 462ms 25 Sep 2025 409th Yewzir 🇧🇪 906 69 413ms 2 Oct 2025 412th sean-niemann 🇺🇸 905 94 710ms 25 Jun 2025 413th GrayJoKing 🇦🇺 904 46 110ms 15 Sep 2023 413th edsrzf 🇳🇿 904 46 58ms 9 days ago 415th JayXon 🇺🇸 903 81 112ms 16 Oct 2022 415th Steffan153 🇫🇮 903 81 110ms 10 Apr 2023 415th sean-niemann 🇺🇸 903 81 124ms 23 Mar 2025 418th GrayJoKing 🇦🇺 903 145 695ms 2 Feb 2024 419th primo-ppcg 🇹🇭 902 68 1,255ms 13 Sep 2023 420th Steffan153 🇫🇮 902 113 193ms 31 Aug 2024 421st ovs-code 🇩🇪 901 51 5ms 10 Dec 2023 421st DialFrost 🇸🇬 901 51 5ms 10 Dec 2023 421st Steffan153 🇫🇮 901 51 5ms 12 Dec 2023 421st MeWhenI 🇻🇦 901 51 5ms 13 Dec 2023 421st dokutan 901 51 5ms 26 Dec 2023 421st kg583 🇺🇸 901 51 5ms 15 Sep 2025 427th primo-ppcg 🇹🇭 900 134 51ms 21 Jun 2022 428th HPWiz 🇳🇿 900 148 2,941ms 12 Oct 2023 429th primo-ppcg 🇹🇭 900 229 4,122ms 4 Oct 2020 430th primo-ppcg 🇹🇭 899 113 54ms 26 Apr 2025 431st pardouin 🇫🇷 898 54 122ms 28 Feb 2025 432nd Steffan153 🇫🇮 898 62 204ms 29 Aug 2024 433rd ovs-code 🇩🇪 898 86 196ms 22 Feb 2025 434th ovs-code 🇩🇪 897 107 4,711ms 18 Jul 2025 435th tomtheisen 🇺🇸 896 56 17ms 28 Sep 2020 435th nathanadams 🇳🇿 896 56 9ms 14 Sep 2021 435th GrayJoKing 🇦🇺 896 56 13ms 11 Nov 2023 435th CaedenHarper 🇨🇦 896 56 9ms 24 Aug 2025 439th Steffan153 🇫🇮 895 95 800ms 31 Aug 2024 440th MeWhenI 🇻🇦 894 83 2,976ms 25 days ago 441st Lydxn 🇨🇦 894 85 508ms 7 Mar 2022 441st ovs-code 🇩🇪 894 85 471ms 16 Jun 2024 443rd Natanaelel 🇸🇪 893 28 42ms 16 May 2025 443rd emgordon154 893 28 46ms 30 Jun 2025 445th diddily 893 29 34ms 29 Oct 2019 445th yzhs 🇩🇪 893 29 33ms 3 Mar 2020 445th lynn 893 29 34ms 13 Apr 2021 445th JayXon 🇺🇸 893 29 35ms 29 Jul 2021 445th rak1507 🇬🇧 893 29 46ms 26 Oct 2021 445th j-Ewan 893 29 49ms 17 Mar 2022 445th stackofbears 893 29 33ms 17 Dec 2023 445th SirBogman 🇺🇸 893 29 36ms 5 Jun 2025 453rd btnlq 892 95 370ms 3 Mar 2023 454th sean-niemann 🇺🇸 892 129 489ms 27 Mar 2025 455th GrayJoKing 🇦🇺 892 139 4,868ms 4 Mar 2025 456th marshallward 🇺🇸 891 114 44ms 28 Jun 2023 457th jared-hughes 891 281 3,980ms 22 Jul 2023 458th GrayJoKing 🇦🇺 890 179 229ms 7 Feb 2024 459th nwellnhof 🇩🇪 890 667 18ms 19 Nov 2022 460th stefangimmillaro 889 60 911ms 14 Oct 2025 461st primo-ppcg 🇹🇭 889 200 40ms 12 May 2023 462nd annaproxy 887 52 166ms 27 Oct 2023 462nd ovs-code 🇩🇪 887 52 72ms 30 Jun 2024 464th sean-niemann 🇺🇸 887 111 694ms 19 Nov 2025 465th GrayJoKing 🇦🇺 887 146 230ms 7 Feb 2024 466th primo-ppcg 🇹🇭 886 96 853ms 19 Nov 2022 467th sean-niemann 🇺🇸 884 86 514ms 26 Sep 2023 467th Steffan153 🇫🇮 884 86 526ms 23 Jul 2024 469th primo-ppcg 🇹🇭 884 142 1,653ms 15 Sep 2025 470th primo-ppcg 🇹🇭 884 146 113ms 16 Aug 2023 471st DialFrost 🇸🇬 882 40 46ms 23 Dec 2024 471st MeWhenI 🇻🇦 882 40 41ms 14 Feb 2025 471st zacjl 882 40 40ms 16 May 2025 474th inventshah 882 673 19ms 18 Nov 2022 475th doge1338 881 57 17ms 7 Sep 2021 475th GeorgeStechman 🇬🇧 881 57 22ms 17 Jun 2022 475th two-bad 🇬🇧 881 57 61ms 4 Dec 2023 475th jbt 881 57 9ms 26 Dec 2023 479th emplv 🇱🇻 881 83 112ms 11 Apr 2023 480th Steffan153 🇫🇮 880 53 828ms 10 Aug 2024 First Prev 401–480 of 2,828 Next Last