26669

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 5x + 4.at n=35A023284
• Primes that remain prime through 4 iterations of function f(x) = 5x + 4.at n=8A023314
• Primes that remain prime through 4 iterations of function f(x) = 6x + 5.at n=23A023317
• Primes that remain prime through 5 iterations of function f(x) = 5x + 4.at n=1A023342
• Primes with either no internal digits or all internal digits are 6.at n=52A069681
• Primes in which no digit is coprime to its neighbors.at n=38A088297
• Numbers k such that 2*10^k+9 is prime.at n=9A101392
• Beastly primes (version 2): primes containing 666 as a substring.at n=2A131645
• Number of wide partitions whose first part is of size n.at n=8A133787
• Primes of the form : (p-n)/(n+1)=prime and (n+1)*p+n=prime. n=4.at n=34A152294
• Smallest of 3 consecutive prime numbers such that p1*p2*p3*d1*d2=average of twin prime pairs; p1,p2,p3 consecutive prime numbers; d1(delta)=p2-p1, d2(delta)=p3-p2.at n=22A153409
• Primes of the form (8*10^n + 7)/3.at n=3A177440
• Primes of the form p^2+100, where p is prime.at n=21A182476
• Fajtlowicz p-primes.at n=35A185955
• a(1)=2; a(n)=smallest prime greater than the half-sum of all previous terms.at n=24A196375
• Primes p such that 10*p-1, 10*p-3, 10*p-7 and 10*p-9 are all prime.at n=15A243408
• Primes p such that 2*p + 23 is a square.at n=36A269785
• Primes having only {2, 6, 9} as digits.at n=17A385788
• Primes having only {0, 2, 6, 9} as digits.at n=31A386052
• Primes having only {2, 4, 6, 9} as digits.at n=34A386156