Repunit R49081 is a probable prime

The Repunit R49081 = (1049081 - 1)/9 is a probable prime. In order to prove primality R49080 must be approximately 33.3% factored. The status of this factorization is included. Repunits are numbers of the form Rn = (10n - 1)/9. Considerable computer time has been spent factoring repunits, creating interesting primes based on the characteristics of repunits, and searching for repunit primes. One intriguing feature of repunit primes is their apparent scarcity with the only known primes being R2,

• Type: Journal
• Year: 2002
• Where: MOC
• Authors: Harvey Dubner
• Keywords: MOC 2002, Repunit, Repunit Primes, Repunit R49081