The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Niven Numbers 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 286th AdrienHache 🇫🇷 962 45 10ms 90 mins ago 322nd HPWiz 🇳🇿 960 37 494ms 17 Nov 2020 322nd JayXon 🇺🇸 960 37 589ms 25 Feb 2021 322nd Lydxn 🇨🇦 960 37 555ms 16 Jun 2021 322nd prplz 🇦🇺 960 37 540ms 19 Jan 2022 322nd antimon2 🇯🇵 960 37 560ms 18 Aug 2022 322nd GrayJoKing 🇦🇺 960 37 485ms 17 Nov 2022 322nd Steffan153 🇫🇮 960 37 571ms 17 Nov 2022 322nd DialFrost 🇸🇬 960 37 539ms 14 Jan 2023 322nd sean-niemann 🇺🇸 960 37 466ms 17 Jan 2023 322nd sisyphus-ppcg 🇦🇺 960 37 630ms 24 Jan 2023 322nd tidalDisruptionEvent 🇨🇦 960 37 689ms 24 Mar 2023 322nd ovs-code 🇩🇪 960 37 585ms 24 Oct 2023 322nd Yewzir 🇧🇪 960 37 485ms 15 Nov 2023 322nd Shanethegamer 🇺🇸 960 37 499ms 10 Dec 2023 322nd pardouin 🇫🇷 960 37 447ms 14 Sep 2024 322nd alemelis 960 37 510ms 26 Sep 2024 322nd twolfive 960 37 528ms 5 Oct 2024 339th primo-ppcg 🇹🇭 959 42 4ms 11 May 2018 339th sisyphus-ppcg 🇦🇺 959 42 5ms 17 Jun 2021 339th Lydxn 🇨🇦 959 42 4ms 7 Apr 2022 339th xsot 🇸🇬 959 42 4ms 23 May 2025 339th targrik 959 42 5ms 21 days ago 339th KasperKivimaeki 🇫🇮 959 42 5ms 7 days ago 345th primo-ppcg 🇹🇭 957 39 9ms 1 Mar 2021 345th GrayJoKing 🇦🇺 957 39 14ms 8 Sep 2021 347th Natanaelel 🇸🇪 955 22 57ms 24 Jul 2022 347th SirBogman 🇺🇸 955 22 40ms 10 Sep 2022 347th 5quiwyrm 955 22 58ms 4 Nov 2022 347th 5cw 🇺🇸 955 22 2ms 10 Apr 2023 347th GolfingSuccess 🇬🇷 955 22 2ms 19 Mar 2025 352nd alexkunin 955 43 9ms 3 Jul 2019 352nd Mazn3k 955 43 8ms 9 Sep 2021 352nd SpareManiKatti 955 43 9ms 11 Sep 2021 352nd jared-hughes 955 43 8ms 13 Aug 2022 352nd AlephSquirrel 955 43 8ms 12 Jan 2023 352nd ejini6969 955 43 9ms 25 Mar 2023 352nd albanian-laundromat 955 43 8ms 24 Sep 2025 352nd Babafaba 955 43 9ms 30 Oct 2025 360th primo-ppcg 🇹🇭 954 46 1ms 25 Apr 2020 360th prplz 🇦🇺 954 46 1ms 16 May 2020 360th Waffle3z 954 46 1ms 18 Oct 2020 360th Lydxn 🇨🇦 954 46 1ms 12 Jan 2021 360th JayXon 🇺🇸 954 46 2ms 11 Feb 2021 360th sisyphus-ppcg 🇦🇺 954 46 1ms 8 Jun 2021 360th ovs-code 🇩🇪 954 46 1ms 19 Nov 2021 360th GrayJoKing 🇦🇺 954 46 2ms 14 Mar 2022 360th lynn 954 46 1ms 3 Jun 2022 360th jared-hughes 954 46 1ms 13 Aug 2022 360th MeWhenI 🇻🇦 954 46 1ms 10 Oct 2022 360th clockworknazo 954 46 1ms 12 Oct 2022 360th Steffan153 🇫🇮 954 46 2ms 30 Nov 2022 360th btnlq 954 46 1ms 26 Dec 2022 360th sean-niemann 🇺🇸 954 46 1ms 17 Jan 2023 360th DialFrost 🇸🇬 954 46 1ms 6 Feb 2023 360th Shanethegamer 🇺🇸 954 46 2ms 8 Mar 2023 360th xsot 🇸🇬 954 46 1ms 9 Oct 2023 360th Betuaredead 954 46 1ms 12 Nov 2023 360th Yewzir 🇧🇪 954 46 1ms 14 Nov 2023 360th pardouin 🇫🇷 954 46 1ms 21 Sep 2024 360th FlyingPenguin223 954 46 1ms 5 Oct 2024 360th fuzzylojik-golf 🇺🇸 954 46 1ms 3 Jul 2025 360th GolfingSuccess 🇬🇷 954 46 1ms 12 Nov 2025 384th sisyphus-ppcg 🇦🇺 953 33 4ms 12 Aug 2024 384th ovs-code 🇩🇪 953 33 4ms 20 Aug 2024 384th emgordon154 953 33 4ms 15 Nov 2024 387th marcin7Cd 953 52 113ms 15 Mar 2020 387th primo-ppcg 🇹🇭 953 52 110ms 25 Apr 2020 387th henkma 953 52 114ms 14 Jun 2020 387th prplz 🇦🇺 953 52 111ms 18 Oct 2020 387th HPWiz 🇳🇿 953 52 116ms 12 Nov 2020 387th JayXon 🇺🇸 953 52 114ms 18 Feb 2021 387th lynn 953 52 113ms 22 Mar 2021 387th Lydxn 🇨🇦 953 52 113ms 22 Mar 2021 387th kops-cg 953 52 111ms 7 Apr 2021 387th xnor-gate 953 52 111ms 9 Jun 2021 387th ssiquoya 🇷🇺 953 52 109ms 11 Jun 2021 387th GrayJoKing 🇦🇺 953 52 117ms 7 Oct 2021 387th annaproxy 953 52 119ms 24 Dec 2021 387th ovs-code 🇩🇪 953 52 114ms 16 Feb 2022 First Prev 321–400 of 4,135 Next Last