Factor Info
| ID | 81661 |
| Size | 144 digits / 478 bits |
| Status | composite |
| Value | 393181223349149579927670776607276092392036142225168029168668807706450282828034281848625789962798803504420475309722588205803531350849385689518421 |
Factorizations
| Primary | (ID: 81662) 1608640147218619352808611771775062504012065972421833902955158583 (proven prime) |
| (ID: 81220) 244418382836565492765495007301625013742763930022937109502053397249759120125259987 (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.