100237

Properties

Appears in sequences

• Values of n where number of permutations of digits a(n) that are prime increases.at n=21A046891
• Smallest n-digit prime which leaves a prime at every step if most significant digit and least significant digit are deleted until a one digit or two digit prime is obtained, or 0 if no such prime exists.at n=5A077391
• Suppose you take the ten digits 0..9, arrange them in any order and then either concatenate adjacent ones or separate them with a plus or minus sign, e.g., 98-76+5-4-32+10 or 9-8-765+3041-2. The first expression totals to "1", the second example totals to "2275". This sequence lists the positive integers that cannot be expressed in this way.at n=30A108224
• Least number that requires n steps to reach 0 by repeated application of f: x -> abs(x - reverse(x)).at n=33A109891
• Primes less than 1000000 sorted lexicographically in decimal representation.at n=19A210761
• Minimal prime with n nonprime substrings (Version 1: substrings with leading zeros are considered to be nonprime).at n=15A213305
• Primes p such that 5*p+6, 5*p+12, 5*p+18 and 5*p+24 are all primes.at n=31A355577
• Prime numbersat n=9610