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A103667 Primes p such that the largest prime divisor of p-1 is greater than the largest prime divisor of p+1. 8
7, 11, 23, 29, 31, 47, 53, 59, 71, 79, 83, 89, 103, 107, 127, 131, 139, 149, 167, 173, 179, 191, 199, 223, 227, 233, 239, 263, 269, 293, 307, 311, 317, 347, 349, 359, 367, 373, 383, 389, 419, 431, 439, 449, 461, 467, 479, 499, 503, 509, 557, 563, 569, 571, 587 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Karl Hovekamp, Table of n, a(n) for n=1..39328

EXAMPLE

a(1)=7 because the largest prime divisor of 6 is greater than the largest

prime divisor of 8.

CROSSREFS

Cf. A023503 greatest prime divisor of n-th prime - 1, A023509 greatest prime divisor of n-th prime + 1, A103666.

Sequence in context: A284052 A211433 A039511 * A033207 A095084 A182569

Adjacent sequences:  A103664 A103665 A103666 * A103668 A103669 A103670

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Feb 19 2005

STATUS

approved

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Last modified August 14 01:00 EDT 2020. Contains 336473 sequences. (Running on oeis4.)