604171

Properties

Appears in sequences

• Weakly prime numbers (changing any one decimal digit always produces a composite number). Also called digitally delicate primes.at n=3A050249
• Primes that show the slow decrease in the larger values of the Andrica function Af(k) = sqrt(p(k+1)) - sqrt(p(k)), where p(k) denotes the k-th prime.at n=18A084975
• The first of two primes in two-prime centuries.at n=9A156998
• Weakly prime numbers (or isolated primes): changing any one decimal digit always produces a composite number, with restriction that first digit may not be changed to a 0.at n=3A158124
• a(n) = smallest member of the n-th term in S(10) (defined in Comments).at n=9A158578
• a(n) = largest member of the n-th term in S(10) (defined in Comments).at n=9A158579
• a(n) is the smallest prime q such that, for the previous prime p and the following prime r, the fraction (r-q)/(q-p) has denominator n in lowest terms.at n=48A179234
• Numbers ending in 1, 3, 7 or 9 such that changing any one decimal digit produces a composite number.at n=5A186694
• Digitally delicate primes where the number of digits appended on the left needed to get a prime increases.at n=1A354440
• Prime numbersat n=49415