109891

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 8x + 5.at n=7A023321
• Primes that remain prime through 5 iterations of function f(x) = 8x + 5.at n=0A023349
• Bemirps: primes that yield a different prime when turned upside down with reversals of both being two more different primes.at n=9A048895
• Primes of the form p^2 + p - 1 when p is prime.at n=25A053185
• Fourth row of Pascal-(1,5,1) array A081580.at n=15A081590
• Primes arising in A083989.at n=12A083990
• Primes which become emirps when rotated by 180 degrees on a digital clock display.at n=23A145750
• Emirps which remain primes when rotated by 180 degrees on a digital clock display.at n=27A159064
• Numbers n of the form 4*k+3 such that 2^(m-1) == 1 (mod m) where m = (2*n-1)*n.at n=15A187923
• Irregular primes with irregularity index four.at n=12A219332
• Least prime p such that 3 + 4*prime(p*n) = 5*prime(q*n) for some prime q.at n=46A260886
• Centered 18-gonal (or octadecagonal) primes.at n=38A264825
• Bemirps that also interpret 2 and 5 as upside-down forms of each other, assuming a digital font.at n=9A335731
• Emirps p such that p+(sum of digits of p) and reverse(p)+(sum of digits of p) are emirps.at n=5A340843
• Prime numbersat n=10445