44449

Properties

Appears in sequences

• Primes that contain digits 4 and 9 only.at n=4A020466
• Smallest n-digit prime containing only the digits 4 and 9, or 0 if no such prime exists.at n=4A036945
• Smallest prime containing exactly n 4's.at n=4A037061
• Numbers having four 4's in base 10.at n=24A043508
• Primes whose digits are composite; primes having only {4, 6, 8, 9} as digits.at n=22A051416
• McKay-Thompson series of class 14A for Monster.at n=18A058497
• Smallest prime beginning with exactly n 4's.at n=4A065587
• Smallest prime beginning with exactly n n's.at n=3A068120
• a(n) = smallest prime that can be written in base 10 using just n n's.at n=4A069569
• Primes with either no internal digits or all internal digits are 4.at n=54A069679
• Smallest prime beginning with at least n n's (in decimal notation).at n=4A088639
• Primes of the form identical digits followed by a 9.at n=9A090148
• Primes of the form 40*R_k + 9, where R_k is the repunit (A002275) of length k.at n=1A093402
• a(n) is the smallest prime greater than 4(10^n - 1)/9.at n=5A099658
• Near-repdigit primes with at least two 4's as the repeated digit.at n=4A105980
• Primes having only {4, 6, 9} as digits.at n=10A107666
• Smallest factor of 2^(2n+1)+(2n+1)^2.at n=67A109216
• McKay-Thompson series of class 14A for the Monster group with a(0) = 1.at n=18A134782
• List of quadruples of strictly non-palindromic primes without an ordinary prime in between them.at n=0A138359
• Primes p such that none of p-2, p-1, p+1, and p+2 is squarefree.at n=19A153215