A185704 Final prime adjoined in the smallest term of A019518 divisible by 73^n.

593, 23909, 4851169, 84821071, 13231167673

Offset: 1

Author

James G. Merickel, Feb 05 2011

Keywords

• nonn
• base
• more

Comments

Associated with A019518(i) at i = 108, 2660, 338775, 4933945,...

Crossrefs

Cf. A185656, A185659, A185662, A185665, A185671, A185677, A185680.

Programs

Python

from sympy import nextprime
def A185704(n):
    p, k, m = 2, 73**n, 10
    q, m2 = p % k, m % k
    while True:
        p = nextprime(p)
        while p >= m:
            m *= 10
            m2 = m % k
        q = (q*m2 + p) % k
        if q == 0:
            return p # Chai Wah Wu, May 01 2020

Extensions

a(5) from Chai Wah Wu, May 01 2020