{"id":28780733,"url":"https://github.com/sergeyshk/project-euler","last_synced_at":"2026-04-30T06:32:56.567Z","repository":{"id":102339110,"uuid":"159189991","full_name":"SergeyShk/Project-Euler","owner":"SergeyShk","description":"My solutions to the problems of the Project Euler","archived":false,"fork":false,"pushed_at":"2020-04-15T20:13:29.000Z","size":1113,"stargazers_count":3,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"master","last_synced_at":"2026-04-30T06:32:42.647Z","etag":null,"topics":["euler","python"],"latest_commit_sha":null,"homepage":null,"language":"Jupyter 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Notebook","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Project Euler\n \n\u003cp align=\"center\"\u003e \n\u003cimg src=\"Images/title.jpg\" width=\"500\"\u003e\n\u003c/p\u003e\n\nMy [solutions](https://projecteuler.net/progress=Kouki) to the problems of the Project Euler\n\n## Problems\n\n| № | Title | Solution |\n| :---: | :---: | :---: |\n| 1 | Multiples of 3 and 5 | 233168 |\n| 2 | Even Fibonacci numbers | 4613732 |\n| 3 | Largest prime factor | 6857 |\n| 4 | Largest palindrome product | 906609 |\n| 5 | Smallest multiple | 232792560 |\n| 6 | Sum square difference | 25164150 |\n| 7 | 10001st prime | 104743 |\n| 8 | Largest product in a series | 23514624000 |\n| 9 | Special Pythagorean triplet | 31875000 |\n| 10 | Summation of primes | 142913828922 |\n| 11 | Largest product in a grid | 70600674 |\n| 12 | Highly divisible triangular number | 76576500 |\n| 13 | Large sum | 5537376230 |\n| 14 | Longest Collatz sequence | 837799 |\n| 15 | Lattice paths | 137846528820 |\n| 16 | Power digit sum | 1366 |\n| 17 | Number letter counts | 21124 |\n| 18 | Maximum path sum I | 1074 |\n| 19 | Counting Sundays | 171 |\n| 20 | Factorial digit sum | 648 |\n| 21 | Amicable numbers | 31626 |\n| 22 | Names scores | 871198282 |\n| 23 | Non-abundant sums | 4179871 |\n| 24 | Lexicographic permutations | 2783915460 |\n| 25 | 1000-digit Fibonacci number | 4782 |\n| 26 | Reciprocal cycles | 983 |\n| 27 | Quadratic primes | -59231 |\n| 28 | Number spiral diagonals | 669171001 |\n| 29 | Distinct powers | 9183 |\n| 30 | Digit fifth powers | 443839 |\n| 31 | Coin sums | 73682 |\n| 32 | Pandigital products | 45228 |\n| 33 | Digit cancelling fractions | 100 |\n| 34 | Digit factorials | 40730 |\n| 35 | Circular primes | 55 |\n| 36 | Double-base palindromes | 872187 |\n| 37 | Truncatable primes | 748317 |\n| 38 | Pandigital multiples | 932718654 |\n| 39 | Integer right triangles | 840 |\n| 40 | Champernowne's constant | 210 |\n| 41 | Pandigital prime | 7652413 |\n| 42 | Coded triangle numbers | 748317 |\n| 43 | Sub-string divisibility | 16695334890 |\n| 44 | Pentagon numbers | 5482660 |\n| 45 | Triangular, pentagonal, and hexagonal | 1533776805 |\n| 46 | Goldbach's other conjecture | 5777 |\n| 47 | Distinct primes factors | 134043 |\n| 48 | Self powers | 9110846700 |\n| 49 | Prime permutations | 296962999629 |\n| 50 | Consecutive prime sum | 997651 |\n| 51 | Prime digit replacements | 121313 |\n| 52 | Permuted multiples | 142857 |\n| 53 | Combinatoric selections | 4075 |\n| 54 | Poker hands | 376 |\n| 55 | Lychrel numbers | 249 |\n| 56 | Powerful digit sum | 972 |\n| 57 | Square root convergents | 153 |\n| 58 | Spiral primes | 26241 |\n| 59 | XOR decryption | 107359 |\n| 60 | Prime pair sets | 26033 |\n| 61 | Cyclical figurate numbers | 28684 |\n| 62 | Cubic permutations | 127035954683 |\n| 63 | Powerful digit counts | 49 |\n| 64 | Odd period square roots | 1322 |\n| 65 | Convergents of e | 272 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