Factor Info
| ID | 163617 |
| Size | 81 digits / 268 bits |
| Status | composite |
| Value | 256655737614408757131267992981638415709927906166113332701048014348474386016337139 |
Factorizations
| Primary | (ID: 163618) 817674426797527142971 (proven prime) |
| (ID: 163534) 313885000194535801349213380101515198445647152967973904522409 (composite) |
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.