90001

Properties

Appears in sequences

• Primes p == 1 (mod 4) where class number of Q(sqrt p) increases.at n=12A002142
• Beginning of last prime pattern of length n to appear among positive integers.at n=22A035326
• Beginning of last prime pattern of length n to appear among positive integers.at n=23A035326
• Numbers k such that k^2 contains only digits {0,1,8}, not ending with zero.at n=8A058421
• Smallest prime in which the n-th significant digit is a 9.at n=4A069593
• The quintuples (d1,d2,d3,d4,d5) with elements in {2,4,6} are listed in lexicographic order; for each quintuple, this sequence lists the smallest prime p >= 7 such that the differences between the 6 consecutive primes starting with p are (d1,d2,d3,d4,d5), if such a prime exists.at n=27A078872
• Sorted version of A078872.at n=37A078873
• Primes p such that the differences between the 5 consecutive primes starting with p are (6,4,6,2).at n=14A078963
• Suppose p and q = p+22 are primes. Define the difference pattern of (p,q) to be the successive differences of the primes in the range p to q. There are 51 possible difference patterns, shown in the Comments line. Sequence gives smallest value of p for each difference pattern, sorted by magnitude.at n=50A079021
• First n-digit number that occurs in the sequence A085951.at n=4A085952
• Reverse digits of largest primes, append to sequence if result is larger prime then previous one with reverse digits.at n=21A098922
• Take the n-th pair of consecutive digits of the sequence and form their absolute difference; the result is the n-th digit of the sequence; a(n) < a(n+1).at n=17A102694
• Indices of records in A109631.at n=36A109640
• Happy primes of the form a*10^k + b with single-digit a and b, a > 0, k > 0.at n=19A109902
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 8 and 9.at n=41A136867
• Numbers k such that k and k^2 use only the digits 0, 1, 5, 8 and 9.at n=27A136874
• Numbers k such that k and k^2 use only the digits 0, 1, 6, 8 and 9.at n=29A136879
• Numbers k such that k and k^2 use only the digits 0, 1, 7, 8 and 9.at n=29A136880
• Numbers k such that k and k^2 use only the digits 0, 1, 8 and 9.at n=27A136881
• Middle of 3 consecutive prime numbers such that p1*p2*p3 + d1 + d2 - 1 = average of twin prime pairs, d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=20A153404