The Calendar hole will go live in approximately 6 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 481st DialFrost 🇸🇬 880 102 147ms 14 Apr 2025 482nd DialFrost 🇸🇬 879 137 1,575ms 28 Mar 2025 483rd ovs-code 🇩🇪 879 148 1,664ms 12 Oct 2024 484th inventshah 878 118 1,472ms 22 Jul 2024 485th itiievskyi 🇺🇦 877 40 262ms 20 Aug 2020 485th FlorianCassayre 🇫🇷 877 40 2,338ms 26 May 2024 487th primo-ppcg 🇹🇭 877 266 979ms 6 Aug 2025 488th MeWhenI 🇻🇦 876 70 1,305ms 8 Jun 2023 489th sean-niemann 🇺🇸 876 116 10ms 23 Sep 2025 490th marcin7Cd 875 49 5ms 31 Jan 2021 490th ovs-code 🇩🇪 875 49 5ms 11 Mar 2023 492nd jiaminglimjm 🇲🇾 875 55 11ms 26 Nov 2019 492nd NewDefectus 🇮🇱 875 55 9ms 12 Oct 2020 492nd bbonenfant 875 55 9ms 27 Nov 2020 492nd RDShah 875 55 9ms 10 May 2021 492nd jared-hughes 875 55 9ms 2 Oct 2021 492nd MichalMarsalek 🇨🇿 875 55 9ms 2 Nov 2021 492nd btjones0 875 55 9ms 10 Dec 2021 492nd HumanEquivalentUnit 875 55 9ms 28 Dec 2021 492nd Shanethegamer 🇺🇸 875 55 9ms 28 Jan 2022 492nd Alex-x90 🇺🇸 875 55 11ms 10 Mar 2022 492nd cooljoseph1 875 55 9ms 6 May 2022 492nd LogicalJoe 875 55 9ms 19 Sep 2022 492nd FlorianCassayre 🇫🇷 875 55 9ms 9 Oct 2022 492nd aiarzhantsev 875 55 9ms 14 Oct 2022 492nd betaveros 875 55 9ms 1 Jan 2023 492nd 5cw 🇺🇸 875 55 33ms 24 Apr 2023 492nd klixel 🇨🇦 875 55 9ms 5 Jun 2023 492nd jacobly0 🇺🇸 875 55 9ms 1 Sep 2023 492nd wen1now 875 55 12ms 7 Nov 2023 492nd nstearns96 🇬🇧 875 55 9ms 13 Oct 2024 492nd andrewjc2000 875 55 9ms 21 Oct 2024 492nd cros107 🇦🇺 875 55 9ms 18 Mar 2025 492nd StinkyMilo 875 55 9ms 12 May 2025 492nd BREMAUCY 🇫🇷 875 55 9ms 25 Jul 2025 492nd jasonxue1 875 55 9ms 26 Jul 2025 492nd jipsong 🇩🇪 875 55 9ms 25 Aug 2025 492nd FortuiteMan 🇫🇷 875 55 10ms 7 days ago 519th MeWhenI 🇻🇦 873 39 37ms 6 May 2022 519th janlelis 873 39 82ms 24 Aug 2022 521st FortuiteMan 🇫🇷 873 85 220ms 12 Nov 2025 522nd GrayJoKing 🇦🇺 873 138 67ms 8 Feb 2024 523rd jared-hughes 872 130 347ms 43 hours ago 524th sean-niemann 🇺🇸 871 53 177ms 25 Mar 2025 525th SirBogman 🇺🇸 868 117 19ms 28 May 2023 526th galloj 🇨🇿 867 685 80ms 1 Mar 2023 527th andersk 🇺🇸 866 58 19ms 21 Mar 2020 527th jared-hughes 866 58 8ms 6 Oct 2021 527th itsh01 866 58 23ms 22 Aug 2022 527th targrik 866 58 16ms 18 Feb 2025 531st DialFrost 🇸🇬 864 54 283ms 19 Jul 2024 532nd jared-hughes 863 30 34ms 20 Oct 2021 532nd ZakkkkAttackkkk 🇵🇭 863 30 46ms 26 Dec 2021 534th MeWhenI 🇻🇦 862 29 595ms 25 Jul 2022 534th lifthrasiir 🇰🇷 862 29 53ms 5 Dec 2024 536th ovs-code 🇩🇪 860 62 959ms 15 Oct 2025 537th AforAmpere 859 56 10ms 21 Jan 2020 537th LucasBertocchini 859 56 9ms 9 Dec 2020 537th argusdusty 🇺🇸 859 56 9ms 31 Dec 2020 537th knutae 🇳🇴 859 56 9ms 1 Nov 2021 537th Irratix 🇳🇱 859 56 10ms 26 Apr 2022 537th jhu04 859 56 9ms 23 Sep 2022 537th fkantelberg 859 56 9ms 5 Aug 2023 537th Natanaelel 🇸🇪 859 56 9ms 2 Dec 2023 537th programjames 859 56 11ms 24 Dec 2023 537th mathisfun271 859 56 11ms 13 Feb 2024 537th elgan65536 859 56 10ms 11 Apr 2024 537th anter69 🇭🇺 859 56 9ms 19 Apr 2024 537th croc54 859 56 9ms 3 Dec 2024 537th xiaoyiming123 859 56 9ms 24 Jul 2025 551st primo-ppcg 🇹🇭 858 90 206ms 10 Dec 2022 552nd lynn 855 41 241ms 7 Mar 2021 553rd edsrzf 🇳🇿 855 105 177ms 19 days ago 554th sean-niemann 🇺🇸 854 55 2,974ms 23 Oct 2024 555th primo-ppcg 🇹🇭 854 106 1,853ms 6 Feb 2023 556th primo-ppcg 🇹🇭 854 152 273ms 22 Jan 2020 557th ovs-code 🇩🇪 851 40 120ms 23 Aug 2024 558th DialFrost 🇸🇬 851 57 137ms 3 Aug 2024 558th ovs-code 🇩🇪 851 57 138ms 3 Aug 2024 560th piano-miles 851 59 9ms 31 Dec 2023 First Prev 481–560 of 2,811 Next Last