A230668
Smallest of 5 consecutive odd numbers that are primes or pseudoprime (base 2).
Original entry on oeis.org
280743771536011781, 666787209284980781, 1386744766793550161, 6558237049521329741, 11646802313400102461
Offset: 1
280743771536011781 is in sequence because 280743771536011781, 280743771536011783, 280743771536011785, 280743771536011787, 280743771536011789 is a set of 5 consecutive odd number where 280743771536011785 is pseudoprime base 2 and others are prime.
A230667
Smallest starting number for n consecutive odd numbers that are primes or pseudoprime (base 2).
Original entry on oeis.org
3, 3, 3, 641, 280743771536011781
Offset: 1
First and smallest occurrence of n, n >= 1, consecutive odd numbers that are primes or pseudoprimes (base 2):
a(1) = 3: (3) ;
a(2) = 3: (3, 5) ;
a(3) = 3: (3, 5, 7);
a(4) = 641: (641, 643, 645, 647); (645 is pseudoprime base 2 and others are prime);
a(5) = 280743771536011781: (280743771536011781, 280743771536011783, 280743771536011785, 280743771536011787, 280743771536011789); (280743771536011785 is pseudoprime base 2 and others are prime).
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