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A230811 Smallest starting number for n consecutive odd numbers that are primes or strong pseudoprime (base 2). 0
3, 3, 3, 1640293473202755797 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
It is conjectured that there can be at most one more term, a(5).
LINKS
EXAMPLE
First and smallest occurrence of n, n >= 1, consecutive odd numbers that are primes or strong pseudoprime (base 2):
a(1) = 3: (3) ;
a(2) = 3: (3, 5) ;
a(3) = 3: (3, 5, 7);
a(4) = 1640293473202755797: (1640293473202755797, 1640293473202755799, 1640293473202755801, 1640293473202755803); (1640293473202755801 is strong pseudoprime base 2 and others are prime);
CROSSREFS
Sequence in context: A343120 A230667 A131462 * A371274 A117032 A243823
KEYWORD
nonn,hard,fini
AUTHOR
Shyam Sunder Gupta, Oct 30 2013
STATUS
approved

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Last modified March 18 22:09 EDT 2024. Contains 370951 sequences. (Running on oeis4.)