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Integers k such that the k-th prime divides the k-th Lucas number
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4d085c9032
Remove commit history
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3 years ago |
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Largest prime factor of n^n - n^(n-1) - n^(n-2) - ... - n^2 - n - 1
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8fc34c482e
Update.
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2 years ago |
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Numbers k such that k^4*2^k - 1 is a prime
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d77557bf3c
new file: oeis-research/Juri-Stepan Gerasimov/Numbers k such that k^4*2^k - 1 is a prime/prog.sf
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7 months ago |
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Numbers k such that omega(2^k-1) = omega(2*k-1)
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a449e5cd63
new file: oeis-research/J. M. Bergot/a(n) is the first prime that starts a sequence of exactly n consecutive primes prime(k+1), ..., prime(k+n) where prime(k+i)+2^i is prime for i = 1...n but not for i = n+1/prog.pl
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1 year ago |
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Numbers n such that n^(n + 1)*(n + 1)^n + 1 is prime
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4d085c9032
Remove commit history
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3 years ago |
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Numbers q such that (4*q^2-1)*2^q + 1 is prime
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e971514faf
Update.
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1 month ago |
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Primes p such that 2^p - p^2 is prime
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e38f3391fa
Update.
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1 year ago |
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Smallest positive number k such that k^2 - 1 and k^2 + 1 each have n distinct prime divisors
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752ebc659a
Update.
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8 months ago |
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Smallest prime p such that A005117(k+1) - A005117(k-1) = n, where p = A005117(k) for some k
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ce64de438a
new file: oeis-research/Altug Alkan/Least k such that k^n + 1 is the product of n distinct primes/prog.sf
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1 year ago |
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Smallest prime p such that bigomega(p^n - 2) = bigomega(p^n + 2) = n
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61449f48a1
Update.
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8 months ago |
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Sum of remainders of the n-th composite mod k, for k=1..n
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47a7397f2c
new file: oeis-research/Joseph Biberstine/Sum of remainders of the n-th prime mod k, for k = 1..n/prog.sf
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3 years ago |
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a(n) is the least k>1 such that omega(k) is equal to (omega(n*k + 1) - 1) over n
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61449f48a1
Update.
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8 months ago |
