ProjectEuler

It is nearly 4 years ago that I started woking on Problems from Project Euler. As a proof I uploaded all my java code to github back then. Sinds then I have tried many diferent languages and approaches. The problems can be found here:  https://projecteuler.net/archives
 
All programs without _Name are not solved jet. They are just there to share them between the different distro's I use.

my account

https://projecteuler.net/profile/timostrating.png
Friend key: 924117_C8a0Xl0x2HKYpESCRXxMrgUxMNG6wq41

		Java	Ruby	C	Lisp Scheme	Scala	PHP	PL SQL	Mathe- matica	Rust	Kotlin	Lua	Haskell, Bash, Brainfuck, Go, Lolcode, ...
1	Multiples of 3 and 5	x	x	x	x	x	x	x	x	x	x	x	...
2	Even Fibonacci numbers	x	x	x	x	x		x	x	x	x	x	...
3	Largest prime factor	x	x	x				x	x	x	x		...
4	Largest palindrome product	x	x			x	x		x		x		...
5	Smallest multiple	x	x						x				...
6	Sum square difference	x	x		x		x		x		x		...
7	10001st prime	x	x						x				...
8	Largest product in a series	x	x						x				...
9	Special Pythagorean triplet	x	x										...
10	Summation of primes	x	x		x				x				...
11	Largest product in a grid	x	x										...
12	Highly divisible triangular number	x	x						x				...
13	Large sum	x	x										...
14	Longest Collatz sequence	x	x										...
15	Lattice paths	x											...
16	Power digit sum	x	x										...
17	Number letter counts	x											...
18	Maximum path sum I	x	x										...
19	Counting Sundays	x	x										...
20	Factorial digit sum	x	x		x				x				...
21	Amicable numbers	x	x										...
22	Names scores	x											...
23	Non-abundant sums	x											...
24	Lexicographic permutations	x											...
25	1000-digit Fibonacci number	x	x						x				...
26	Reciprocal cycles	x											...
27	Quadratic primes	x											...
28	Number spiral diagonals	x											...
29	Distinct powers	x											...
30	Digit fifth powers	x											...
31	Coin sums	x			x								...
32	Pandigital products	x											...
33	Digit cancelling fractions	x											...
34	Digit factorials	x											...
35	Circular primes	x											...
36	Double-base palindromes	x											...
37	Truncatable primes	x											...
38	Pandigital multiples	x											...
39	Integer right triangles	x											...
40	Champernowne's constant	x											...
41	Pandigital prime	x											...
42	Coded triangle numbers	x											...
43	Sub-string divisibility	x											...
44	Pentagon numbers	x											...
45	Triangular, pentagonal, and hexagonal	x											...
46	Goldbach's other conjecture	x											...
47	Distinct primes factors	x							x				...
48	Self powers	x							x				...
49	Prime permutations	x											...
50	Consecutive prime sum	x											...
...	...	...	...										...