25409

Properties

Appears in sequences

• Smaller of twin primes whose middle term is a multiple of A002110(4)=210.at n=19A060230
• Smaller of twin primes whose middle term is a multiple of A002110(5)=2310.at n=3A060231
• Primes p such that 11 is the largest of all prime factors of the numbers between p and the next prime (cf. A052248).at n=21A080187
• Table read by rows where i-th row consists of primes P of the form P=j*P(i)# -1 or P=j*P(i)# +1 with 0 < j < P(i+1). Here P(r)# = A002110.at n=41A087715
• Smaller of twin primes of the form P=j*P(i)#-1 and P=j*P(i)#+1 with 0 < j < P(i+1), where P(i) denotes i-th prime and P(i)# the i-th primorial number A002110(i).at n=13A087732
• Largest prime p such that the sum of n consecutive primes plus p is equal to (n+1)^3.at n=28A100572
• Smallest prime for which 2^n exactly divides the class number h(8p) and X^2 - 2pY^2 = 2 is solvable.at n=4A102266
• Primes from merging of 5 successive digits in decimal expansion of Pi.at n=26A104825
• Highly cototient numbers that are prime, or intersection of A000040 and A100827.at n=39A105440
• Smallest prime p such that k*p + k + 1 is prime for k=1..n.at n=4A186969
• Smallest prime p such that k*p + k + 1 is prime for k=1..n.at n=5A186969
• Primes of the form A060735(k) +- 1, where A060735 lists multiples of primorials (A002110) less than the next larger primorial.at n=40A257658
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 782", based on the 5-celled von Neumann neighborhood.at n=40A290300
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 782", based on the 5-celled von Neumann neighborhood.at n=41A290300
• Numbers k such that phi(sigma(k))/k < phi(sigma(m))/m for all m < k, where sigma is the sum of divisors function (A000203) and phi is Euler's totient function (A000010).at n=28A293711
• Numbers k such that phi(psi(k))/k < phi(psi(m))/m for all m < k, where phi is Euler's totient function (A000010) and psi is the Dedekind psi function (A001615).at n=30A293713
• Numbers k where records occur for phi(k)/phi(k+1), where phi is the Euler totient function (A000010).at n=24A335070
• a(n) is the least number whose sum of digits in primorial base equals n.at n=33A343048
• Primes such that x^16 = 2 has a solution in Z/pZ, but x^32 = 2 does not.at n=9A373468
• Prime numbersat n=2801