Factor Info
| ID | 1644 |
| Size | 77 digits / 256 bits |
| Status | composite |
| Value | 66215130676078920656219516017171330309743721838481277768169032425661407171841 |
Factorizations
| Primary | (ID: 73) 115561578124838522881 (proven prime) |
| (ID: 1645) 572985690837037837785274755096815495464402963048090748161 (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.