2n-21,382,107,400,956,509,849 is never a prime
By: Joel Spencer.
Series: Paper / Rand -- P-4229; P (Rand Corporation) -- P-4229.
Publisher: Rand Corp.
Published: 1969
Place of publication: [Santa Monica, Calif
Language: eng
Subjects: Numbers, Divisibility of.
Notes: Cover title.

"P-4229."

"October 1969."