The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
√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 MichalMarsalek 🇨🇿 871 55 9ms 2 Nov 2021 476th HumanEquivalentUnit 871 55 9ms 28 Dec 2021 476th Shanethegamer 🇺🇸 871 55 9ms 28 Jan 2022 476th cooljoseph1 871 55 9ms 6 May 2022 476th LogicalJoe 871 55 9ms 19 Sep 2022 476th aiarzhantsev 871 55 9ms 14 Oct 2022 476th betaveros 871 55 9ms 1 Jan 2023 476th 5cw 🇺🇸 871 55 33ms 24 Apr 2023 476th klixel 🇨🇦 871 55 9ms 5 Jun 2023 476th jacobly0 🇺🇸 871 55 9ms 1 Sep 2023 476th wen1now 871 55 12ms 7 Nov 2023 476th namelessiw 871 55 30ms 6 Dec 2023 476th jatloe 871 55 18ms 27 Sep 2024 476th nstearns96 🇬🇧 871 55 9ms 13 Oct 2024 476th andrewjc2000 871 55 9ms 21 Oct 2024 476th cros107 🇦🇺 871 55 9ms 18 Mar 2025 476th BREMAUCY 🇫🇷 871 55 9ms 25 Jul 2025 476th piano-miles 871 55 11ms 3 Aug 2025 476th jipsong 🇩🇪 871 55 9ms 25 Aug 2025 476th FortuiteMan 🇫🇷 871 55 10ms 5 days ago 501st GrayJoKing 🇦🇺 869 138 67ms 8 Feb 2024 502nd MeWhenI 🇻🇦 868 70 1,305ms 8 Jun 2023 503rd sean-niemann 🇺🇸 867 86 514ms 26 Sep 2023 503rd Steffan153 🇫🇮 867 86 526ms 23 Jul 2024 505th MeWhenI 🇻🇦 865 39 53ms 6 May 2022 505th janlelis 865 39 85ms 24 Aug 2022 507th DialFrost 🇸🇬 864 40 46ms 23 Dec 2024 507th MeWhenI 🇻🇦 864 40 41ms 14 Feb 2025 507th zacjl 864 40 40ms 16 May 2025 510th marcin7Cd 864 49 5ms 31 Jan 2021 510th ovs-code 🇩🇪 864 49 5ms 11 Mar 2023 512th SirBogman 🇺🇸 864 117 19ms 28 May 2023 513th andersk 🇺🇸 860 58 19ms 21 Mar 2020 513th jared-hughes 860 58 8ms 6 Oct 2021 513th itsh01 860 58 23ms 22 Aug 2022 513th targrik 860 58 16ms 18 Feb 2025 517th AforAmpere 856 56 10ms 21 Jan 2020 517th LucasBertocchini 856 56 9ms 9 Dec 2020 517th argusdusty 🇺🇸 856 56 9ms 31 Dec 2020 517th knutae 🇳🇴 856 56 9ms 1 Nov 2021 517th jhu04 856 56 9ms 23 Sep 2022 517th fkantelberg 856 56 9ms 5 Aug 2023 517th Natanaelel 🇸🇪 856 56 9ms 2 Dec 2023 517th programjames 856 56 11ms 24 Dec 2023 517th mathisfun271 856 56 11ms 13 Feb 2024 517th croc54 856 56 9ms 3 Dec 2024 517th agreegious 856 56 86ms 16 Mar 2025 517th xiaoyiming123 856 56 9ms 24 Jul 2025 529th DialFrost 🇸🇬 854 54 283ms 19 Jul 2024 530th FortuiteMan 🇫🇷 854 83 220ms 12 Nov 2025 531st primo-ppcg 🇹🇭 852 90 206ms 10 Dec 2022 532nd ovs-code 🇩🇪 851 62 959ms 15 Oct 2025 533rd primo-ppcg 🇹🇭 850 152 273ms 22 Jan 2020 534th primo-ppcg 🇹🇭 849 106 2,214ms 6 Feb 2023 535th primo-ppcg 🇹🇭 847 159 138ms 5 Apr 2025 536th piano-miles 845 59 9ms 31 Dec 2023 536th Larento 845 59 8ms 5 Nov 2024 538th ovs-code 🇩🇪 843 40 180ms 23 Aug 2024 539th sean-niemann 🇺🇸 843 53 177ms 25 Mar 2025 540th sean-niemann 🇺🇸 843 55 4,148ms 23 Oct 2024 541st JayXon 🇺🇸 843 100 399ms 21 Nov 2021 541st primo-ppcg 🇹🇭 843 100 407ms 21 Nov 2021 541st fuzzylojik-golf 🇺🇸 843 100 395ms 13 Aug 2025 544th jslip 841 28 47ms 31 Jul 2019 544th NewDefectus 🇮🇱 841 28 34ms 28 Jan 2022 546th vezzick 841 57 9ms 5 Mar 2021 546th dsh0 841 57 53ms 7 Jun 2022 546th vishwathg 841 57 80ms 4 Feb 2023 546th AtengChen 841 57 12ms 29 Aug 2024 550th Natanaelel 🇸🇪 840 70 145ms 6 Jul 2025 551st bitsandbeyond 🇳🇱 839 55 392ms 5 Nov 2025 552nd DialFrost 🇸🇬 839 57 137ms 3 Aug 2024 552nd ovs-code 🇩🇪 839 57 138ms 3 Aug 2024 554th Shanethegamer 🇺🇸 838 53 344ms 18 Jan 2024 555th MeWhenI 🇻🇦 838 63 914ms 12 May 2023 555th emgordon154 838 63 1,082ms 17 Nov 2024 557th sean-niemann 🇺🇸 835 101 414ms 7 Aug 2023 558th Shanethegamer 🇺🇸 833 92 186ms 17 Nov 2022 559th edsrzf 🇳🇿 832 103 177ms 17 days ago 560th inventshah 831 60 10ms 23 Jul 2024 First Prev 481–560 of 2,801 Next Last