110881

Properties

Appears in sequences

• Primes with record values of the least positive primitive root.at n=13A002230
• Expansion of 1/((1-x)(1-3x)(1-6x)).at n=6A016211
• Erroneous version of A134996.at n=8A038136
• First term of strong prime sextets: p(m+1)-p(m) > p(m+2)-p(m+1) > p(m+3)-p(m+2) > p(m+4)-p(m+3) > p(m+5)-p(m+4).at n=36A054813
• Primes having only {0, 1, 8} as digits.at n=29A061247
• Numbers k > 1 such that sigma(phi(k))/sigma(k) > sigma(phi(j))/sigma(j) for all 1 < j < k.at n=22A067573
• Primes p such that p-1 is a highly composite number.at n=15A072826
• Stirling-like number triangle defined by sequence A000217.at n=38A080248
• Class 7+ primes.at n=30A081635
• Numbers n such that the least positive primitive root of n is larger than the value for all positive numbers smaller than n.at n=15A081888
• Let p = n-th prime, then a(n) = smallest prime having p as its least prime primitive root.at n=22A084739
• Primes p such that p-1 has more divisors than any smaller prime-1.at n=25A103199
• Primes with 69 as smallest positive primitive root.at n=0A114684
• Primes with record large values of the second smallest positive primitive root.at n=19A124111
• Dihedral calculator primes: p, p upside down, p in a mirror, p upside-down-and-in-a-mirror are all primes.at n=9A134996
• Highly composite numbers + 1.at n=29A135372
• Primes which become emirps when rotated by 180 degrees on a digital clock display.at n=24A145750
• Sums of the form (twin primes + 1) which are also an upper twin prime.at n=15A158870
• Emirps which remain primes when rotated by 180 degrees on a digital clock display.at n=29A159064
• Primes which remain prime after reflection across a vertical line through the middle of the number (numbers are written as digital clock style numerals).at n=30A178318