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A155488 Primes p with property that p^2 is of the form x^2 + 40y^2. 3
7, 11, 13, 19, 23, 37, 41, 47, 53, 59, 89, 103, 127, 131, 139, 157, 167, 173, 179, 197, 211, 223, 241, 251, 263, 277, 281, 293, 317, 331, 367, 373, 379, 383, 397, 401, 409, 419, 449, 463, 487, 491, 499, 503, 521, 557, 569, 571, 601, 607, 613, 619, 641, 647 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
All p^2 are congruent to {1, 9} (mod 40), as in A107145.
Rational primes that decompose in the field Q(sqrt(-10)). - N. J. A. Sloane, Dec 26 2017
LINKS
Zak Seidov, First 1000 terms
MAPLE
Load the Maple program HH given in A296920. Then run HH(-10, 200); This produces A155488, A296925, A293859. - N. J. A. Sloane, Dec 26 2017
CROSSREFS
Cf. A107145 (Primes of the form x^2 + 40y^2).
Sequence in context: A160024 A063911 A087489 * A100350 A084467 A245179
KEYWORD
nonn
AUTHOR
Zak Seidov, Jan 23 2009
STATUS
approved

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Last modified May 22 09:57 EDT 2024. Contains 372745 sequences. (Running on oeis4.)