8251854001
domain: N
Appears in sequences
- Carmichael numbers of the form (60k+41)*(90k+61)*(150k+101), where 60k+41, 90k+61 and 150k+101 are all primes.at n=4A255441
- Carmichael numbers k that satisfy 2^d == 2^(k/d) (mod k) for all d|k and are not Super-Poulet numbers (A050217).at n=21A291612
- a(1) = 561; a(n+1) = smallest Fermat pseudoprime to all natural bases up to lpf(a(n)).at n=23A300629
- Records in A083876.at n=23A348258