1,1
Daniel Heuer found a(5) in 2004 by sieving up to 2^33 and then checking ~8000 candidates with pfgw-linux. Proving primality of 10^99999+309403 is beyond current (2004) technology.
Prime Curios, 10000...33603 (10000-digits).
Chris K. Caldwell, The largest known primes.
Daniel Heuer, Smallest 100000-digit prime? Discussion in the PrimeForm user group.
Henri Lifchitz, Renaud Lifchitz, Probable Primes Top 10000.
a(1)=7 because the smallest ten-digit prime is 1000000007.
a(2)=289 because the smallest 100-digit prime is 10^99+289.
Cf. A033873.
Sequence in context: A062646 A009503 A176072 * A160072 A137435 A041851
Adjacent sequences: A096545 A096546 A096547 * A096549 A096550 A096551
hard,nonn
Hugo Pfoertner (hugo(AT)pfoertner.org), Jul 06 2004
