Problem 1096. Largest Twin Primes
Twin primes are primes p1, p2 = p1 + 2 such that both p1 and p2 are prime numbers. Given a positive integer N (>=5) what are the largest twin primes (in order) <= N. For example, if N = 20 then p1 = 17 and p2 = 19.
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Magic Numbers II
- 14 Problems
- 70 Finishers
- First N Perfect Squares
- Determine if input is a perfect number
- Project Euler: Problem 9, Pythagorean numbers
- Recurring Cycle Length (Inspired by Project Euler Problem 26)
- Project Euler: Problem 9, Pythagorean numbers
- Recurring Cycle Length (Inspired by Project Euler Problem 26)
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- Mersenne Primes
- Determine if input is a Narcissistic number
- Determine if input is a perfect number
- Lychrel Number Test (Inspired by Project Euler Problem 55)
- Largest Twin Primes
- Happy 2013...
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- P-smooth numbers
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- Champernowne Constant
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