OFFSET
1,2
COMMENTS
Since every composite number m is divisible by a prime p <= sqrt(m), the sequence contains only noncomposite numbers.
LINKS
PROG
(PARI) v=0; for(n=1, 541, pp=primepi(sqrtint(n)); if(pp>v, v=pp); if(isprime(n+factorback(primes(v))), print1(n, ", ")));
CROSSREFS
KEYWORD
nonn
AUTHOR
Arkadiusz Wesolowski, May 24 2018
STATUS
approved