theorem :: XPRIMET1:22

for k being Nat
for p being Prime st p * p <= k & k < 1369 & not p = 2 & not p = 3 & not p = 5 & not p = 7 & not p = 11 & not p = 13 & not p = 17 & not p = 19 & not p = 23 & not p = 29 holds
p = 31