My solution

first 5000 prime numbers

Right truncable primes

Left truncable primes

PRIMES [CODING CHALLENGE]

prime number without zero digits is called right truncatable if all numbers obtained by successively removing the rightmost digits are prime Example: 239 is right truncatable 239 => 23 => 2 all of them primes The first few are 2, 3, 5, 7, 23, 29, 31, 37, 53, 59, 71, 73, 79, 233, 239, 293, 311, 313, 317, 373, 379, 593, 599

A prime number without zero digits is called left truncatable when removing leftmost digits the obtained numbers are all primes Example: 167 is left truncatable 167 => 67 => 7 The first few are 2, 3, 5, 7, 13, 17, 23, 37, 43, 47, 53, 67, 73, 83, 97, 113, 137, 167, 173

Challenge: Search right and left truncatable primes between the first 5000 primes

Truncable Primes | Javier ch