dmesg|tail

[  175.964758] sd 2:0:0:0: [sdb] Mode Sense: 53 00 00 08
[  175.964765] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[  175.964889]  sdb: sdb1
[  175.969544] sd 2:0:0:0: [sdb] Attached SCSI disk
[  175.969954] sd 2:0:0:0: Attached scsi generic sg2 type 0
[ 5669.126619] factorial[14614]: segfault at 0000000000020f51 rip 0000000000403617 rsp 00007fff927c8d60 error 4
[ 5669.133562] factorial[14616]: segfault at 0000000000020f51 rip 0000000000403617 rsp 00007fffae604b80 error 4
[ 5669.160497] factorial[14622]: segfault at 0000000000020f51 rip 0000000000403617 rsp 00007fffdeb5e0f0 error 4
[ 5669.161814] factorial[14620]: segfault at 0000000000020f51 rip 0000000000403617 rsp 00007fff554129a0 error 4
[ 5669.181665] factorial[14625]: segfault at 0000000000020f51 rip 0000000000403617 rsp 00007ffff3bda160 error 4