71999

Properties

Appears in sequences

• Least prime in A031938 (lesser of primes differing by 20) whose distance to the next 20-twin is 6*n.at n=5A052359
• a(n) is the smallest number m such that m-k is product of k+1 primes for k=0,1,2,...,n.at n=4A093552
• Primes p such that p's set of distinct digits is {1,7,9}.at n=27A108384
• Middle of 3 consecutive prime numbers, p1, p2, p3, such that p1*p2*p3*d1*d2 = average of twin prime pairs; d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=33A153410
• a(n) = 80*n^2 - 1.at n=29A158774
• Primes containing 999 as a substring.at n=21A167292
• Primes of the form 9n^3-1.at n=3A200960
• Primes of the form 5n^2 - 1.at n=29A201783
• Primes that end in 999.at n=14A230202
• Primes p such that there are exactly p solutions to y^2 + x*y + y == x^3 + x^2 - 10*x - 10 (mod p).at n=43A275777
• a(n) = Sum_{i=1..n-1}(i^(n-2)) mod n^4.at n=29A284760
• Primes of the form 2^a * 3^b * 5^c - 1 for positive a, b, c.at n=46A293425
• Prime numbersat n=7128