OFFSET
1,1
COMMENTS
Nonprime numbers of this form are: 1, 3713, 14849, 28073, 45473, 83753, 102313, 122729, 145001, 195113, 208801, 237569, 252649, 268193, ...
REFERENCES
Leonhard Euler, Facillima methodus plurimos numeros primos praemagnos inveniendi, Nova Acta Academiae Scientiarum Imperialis Petropolitanae Tomus XIV (1805), Mathematica et Physico-Mathematica.
LINKS
Bruno Berselli, Table of n, a(n) for n = 1..1000
Umberto Cerruti, I numeri idonei di Eulero (in Italian), p. 4.
Leonhard Euler, An easy method for finding many very large prime numbers, arXiv:math/0507401 [math.HO], 2005-2008. Translated from Latin.
MATHEMATICA
Select[Table[232 n^2 + 1, {n, 100}], PrimeQ]
PROG
(Magma) [m: n in [1..100] | IsPrime(m) where m is 232*n^2+1];
CROSSREFS
KEYWORD
nonn
AUTHOR
Bruno Berselli, Oct 18 2013
STATUS
approved