The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Pernicious Numbers (Long) 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 320th emgordon154 910 37 868ms 20 Mar 2025 322nd JayXon 🇺🇸 910 67 173ms 19 Mar 2023 322nd Lydxn 🇨🇦 910 67 139ms 20 Mar 2023 322nd jipsong 🇩🇪 910 67 139ms 10 Jun 2024 325th JayXon 🇺🇸 910 75 25ms 25 Jul 2023 326th JayXon 🇺🇸 909 98 275ms 26 Feb 2023 326th Lydxn 🇨🇦 909 98 274ms 20 Jul 2023 326th pardouin 🇫🇷 909 98 260ms 21 Apr 2025 329th Steffan153 🇫🇮 908 55 17ms 23 Nov 2022 330th inventshah 908 58 79ms 22 Nov 2022 331st Lydxn 🇨🇦 908 68 38ms 20 Jul 2023 332nd Lydxn 🇨🇦 907 67 1,286ms 20 Jul 2023 332nd JayXon 🇺🇸 907 67 1,267ms 20 Jul 2023 334th Lydxn 🇨🇦 906 51 6ms 15 Jan 2024 334th GrayJoKing 🇦🇺 906 51 6ms 19 Nov 2025 336th saito-ta 🇯🇵 906 53 62ms 15 Dec 2023 337th DialFrost 🇸🇬 906 54 1,675ms 1 Aug 2024 337th Steffan153 🇫🇮 906 54 139ms 15 Aug 2024 339th primo-ppcg 🇹🇭 906 63 163ms 20 Nov 2022 339th Lydxn 🇨🇦 906 63 127ms 20 Nov 2022 339th Steffan153 🇫🇮 906 63 154ms 14 Jan 2023 339th steffan-polygolf 906 63 151ms 14 Feb 2024 339th DialFrost 🇸🇬 906 63 151ms 23 Apr 2025 344th kg583 🇺🇸 905 69 47ms 13 Feb 2025 344th pardouin 🇫🇷 905 69 52ms 25 Apr 2025 344th DialFrost 🇸🇬 905 69 50ms 25 Apr 2025 347th SirBogman 🇺🇸 904 56 24ms 9 Jan 2024 347th sultan 904 56 16ms 3 Mar 2024 347th andrewdrewl 904 56 16ms 20 Jan 2025 347th qpwoeirut 904 56 15ms 11 Aug 2025 347th Lv0Sys 🇵🇱 904 56 22ms 10 days ago 352nd pardouin 🇫🇷 903 46 505ms 22 Apr 2025 353rd sisyphus-ppcg 🇦🇺 902 52 7ms 21 Nov 2022 353rd xsot 🇸🇬 902 52 29ms 28 Apr 2024 355th primo-ppcg 🇹🇭 901 58 101ms 20 Nov 2022 356th andersk 🇺🇸 901 76 119ms 20 Nov 2022 356th emgordon154 901 76 125ms 19 Mar 2025 356th dokutan 901 76 119ms 15 days ago 359th Lydxn 🇨🇦 900 73 5ms 13 Oct 2023 360th pardouin 🇫🇷 900 77 453ms 22 Apr 2025 361st Lydxn 🇨🇦 900 86 28ms 26 Oct 2023 361st pardouin 🇫🇷 900 86 29ms 23 Apr 2025 363rd primo-ppcg 🇹🇭 900 99 275ms 20 Nov 2022 363rd nwellnhof 🇩🇪 900 99 275ms 26 Nov 2022 365th JayXon 🇺🇸 899 61 4ms 27 Nov 2022 366th GrayJoKing 🇦🇺 899 64 78ms 3 Feb 2025 367th primo-ppcg 🇹🇭 895 46 58ms 20 Nov 2022 367th Shanethegamer 🇺🇸 895 46 57ms 21 Nov 2022 369th xsot 🇸🇬 894 53 4ms 21 Jul 2023 369th SirBogman 🇺🇸 894 53 370ms 20 Jan 2024 371st primo-ppcg 🇹🇭 894 69 46ms 20 Nov 2022 372nd Shanethegamer 🇺🇸 894 78 447ms 25 Sep 2025 372nd ethanlally 894 78 371ms 16 days ago 374th DialFrost 🇸🇬 891 56 17ms 24 Mar 2025 374th sean-niemann 🇺🇸 891 56 16ms 25 Mar 2025 376th primo-ppcg 🇹🇭 891 72 340ms 20 Nov 2022 377th elgan65536 890 77 121ms 15 Apr 2024 377th The3gs 890 77 134ms 29 Nov 2024 377th luuumine 🇫🇷 890 77 118ms 11 days ago 380th emgordon154 889 27 3ms 14 Jun 2025 380th AlephSquirrel 889 27 4ms 4 Nov 2025 382nd edsrzf 🇳🇿 889 48 699ms 9 Sep 2025 383rd Lydxn 🇨🇦 889 89 34ms 20 Jul 2023 384th orthoplex 🇨🇽 888 29 309ms 26 Jan 2024 384th ovs-code 🇩🇪 888 29 410ms 2 Feb 2024 384th fuzzylojik-golf 🇺🇸 888 29 306ms 20 Aug 2025 387th ZakkkkAttackkkk 🇵🇭 888 57 23ms 21 Nov 2022 387th thehylian 888 57 16ms 2 Jan 2023 387th FlorianCassayre 🇫🇷 888 57 17ms 18 Jan 2023 387th bricknellj 888 57 16ms 17 Mar 2023 387th davecame 888 57 26ms 2 Oct 2023 387th Yewzir 🇧🇪 888 57 17ms 8 Oct 2023 387th Betuaredead 888 57 16ms 13 Nov 2023 387th Bulmenisaurus 888 57 17ms 21 Jul 2024 387th ryyyn 🇺🇸 888 57 24ms 25 Jun 2025 387th yujh-yujh 🇬🇸 888 57 25ms 7 days ago 387th AdrienHache 🇫🇷 888 57 24ms 15 hours ago 398th Lydxn 🇨🇦 886 35 410ms 5 Jan 2024 398th pardouin 🇫🇷 886 35 288ms 21 Apr 2025 400th anter69 🇭🇺 886 38 1,084ms 2 Sep 2024 First Prev 321–400 of 1,815 Next Last