A062568
a(n) is the smallest n-digit strong pseudoprime (in base 2).
Original entry on oeis.org
2047, 15841, 104653, 1004653, 10323769, 100463443, 1002261781, 10000321321, 100004790097, 1000002977551, 10000130243671, 100002236680837, 1000003918690669, 10000008250001701, 100000150553089531, 1000000274500018837, 10000003599249373469
Offset: 4
a(1)=2047 because 2047 is the smallest 4-digit strong pseudoprime to base 2.
A067845
Largest n-digit pseudoprime (to base 2).
Original entry on oeis.org
645, 8911, 93961, 997633, 9995671, 99971821, 999828727, 9999109081, 99983971501, 999986341201, 9999946514845, 99999856404001, 999994510007533, 9999999191658001, 99999984319096601, 999999995115616561, 9999999995077192591
Offset: 3
a(2)=8911, so largest pseudoprime (base 2) of 4 digits is 8911.
A062852
Largest n-digit strong pseudoprimes (in base 2).
Original entry on oeis.org
8321, 90751, 983401, 9995671, 99789673, 999828727, 9998721001, 99973476433, 999855751441, 9998974546471, 99999760517281, 999985147456681, 9999952887414577, 99999984319096601, 999999916795882627, 9999999995077192591
Offset: 4
a(4)=8321 since 8321 is the largest 4-digit strong pseudoprime to base 2.
Showing 1-3 of 3 results.