84391

Properties

Appears in sequences

• Prime numbers p of the form 10k+1 for which the quintic polynomial x^5-x-1 modulus p is factorizable into five binomials.at n=16A135842
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1111 pattern in any orientation.at n=10A146601
• Noncomposite numbers in the southwestern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American.at n=34A168026
• Brazilian primes that are also the greater of a pair of twin primes.at n=36A306889
• Prime numbersat n=8225