login
A242930
Primes of the form (k^2+7)/11.
1
37, 53, 193, 373, 421, 673, 1061, 2213, 2753, 3637, 4481, 5237, 5413, 7333, 7541, 8513, 8737, 9781, 11393, 12853, 14401, 15733, 17761, 19237, 21121, 25153, 25537, 27701, 29537, 34273, 34721, 39841, 42533, 47653, 50593, 51137
OFFSET
1,1
COMMENTS
Also equal to primes p such that 11*p-7 is a perfect square.
PROG
(Python)
import sympy
[(k**2+7)/11 for k in range(10**6) if sympy.ntheory.isprime((k**2+7)/11) & ((k**2+7)/11).is_integer()]
CROSSREFS
KEYWORD
nonn
AUTHOR
Chai Wah Wu, Jul 10 2014
STATUS
approved