Factor Info
| ID | 646 |
| Size | 73 digits / 242 bits |
| Status | composite |
| Value | 6531526555164841019743993139048964207333673122542675646953576784143445361 |
Factorizations
| Primary | (ID: 18) 1702945513191305556907097618161 (proven prime) |
| (ID: 1145) 3835428969729521900864406164428218332995201 (proven prime) |
Primary factorization keeps track of the smallest (known) prime factor. Secondary factorizations are old results kept when a new smaller prime factor is found, which occasionally happens with ECM.