Factor Info
| ID | 221 |
| Size | 61 digits / 202 bits |
| Status | composite |
| Value | 4051090875646370784019163571949080768670651594338216756330521 |
Factorizations
| Primary | (ID: 7404) 156525289282548414081799081 (proven prime) |
| (ID: 7405) 25881382454011167597293539763392241 (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.