Smallest prime factor of floor(Pi*10^n).

Terms

a(0) =3a(1) =31a(2) =2a(3) =3a(4) =5a(5) =314159a(6) =2a(7) =2a(8) =3a(9) =3a(10) =5a(11) =2a(12) =13a(13) =163a(14) =43a(15) =13a(16) =2a(17) =317213509a(18) =2a(19) =2a(20) =2a(21) =2a(22) =2a(23) =2a(24) =83a(25) =41a(26) =2a(27) =3a(28) =2a(29) =3