OFFSET
1,1
MATHEMATICA
Select[Range[4, 1274, 2], CompositeQ[# - NextPrime[#, -1]] &] (* Amiram Eldar, Sep 17 2019 *)
PROG
(PARI) is(n) = if(n%2==1 ||n==2, return(0)); my(c = n - precprime(n)); !isprime(c) && c != 1 \\ David A. Corneth, Aug 21 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Aaron Schäfers, Aug 15 2019
STATUS
approved