Factor Info
| ID | 19990 |
| Size | 178 digits / 590 bits |
| Status | composite |
| Value | 3781177083560342771670318421924946417885931718842869773892170430329534240829578004160389284188958433918928946019466645122080058860179989900921081270587322882775884399502797579969 |
Factorizations
| Primary | (ID: 19390) 999999999999990000000000000099999999999999000000000000009999999999999900000000000001 (proven prime) |
| (ID: 19991) 3781177083560380583441154025352663121070150968307048633209358859027273162533881299502797579969 (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.