Fermat numbers: Difference between revisions
Content added Content deleted
m (Performance improvement) |
m (Rust - reformatted with rustfmt) |
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use rug::Integer; |
use rug::Integer; |
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fn fermat(n |
fn fermat(n: u32) -> Integer { |
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Integer::from(Integer::u_pow_u(2, 2u32.pow(n))) + 1 |
Integer::from(Integer::u_pow_u(2, 2u32.pow(n))) + 1 |
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} |
} |
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fn g(x |
fn g(x: Integer, n: &Integer) -> Integer { |
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(Integer::from(&x * &x) + 1) % n |
(Integer::from(&x * &x) + 1) % n |
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} |
} |
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fn pollard_rho(n |
fn pollard_rho(n: &Integer) -> Integer { |
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use rug::Assign; |
use rug::Assign; |
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| Line 1,799: | Line 1,799: | ||
} |
} |
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fn get_prime_factors(n |
fn get_prime_factors(n: &Integer) -> Vec<Integer> { |
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use rug::integer::IsPrime; |
use rug::integer::IsPrime; |
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let mut factors = Vec::new(); |
let mut factors = Vec::new(); |
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| Line 1,814: | Line 1,814: | ||
} |
} |
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factors.push(Integer::from(&f)); |
factors.push(Integer::from(&f)); |
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m = m/f; |
m = m / f; |
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} |
} |
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factors |
factors |
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