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Math-Prime-Util-0.58
River stage two • 12 direct dependents • 19 total dependents
22 ++

Changes for version 0.58 - 2016-05-21

  • API Changes
    • prev_prime($n) where $n <= 2 now returns undef instead of 0. This may enable catching range errors, and is technically more correct.
    • nth_prime(0) now returns undef instead of 0. This should help catch cases where the base wasn't understood. The change is similar for all the nth_* functions (e.g. nth_twin_prime).
    • sumdigits(n,base) will interpret n as a number in the given base, rather than the Pari/GP method of converting decimal n to that base then summing. This allows sumdigits to easily sum hex strings. The old behavior is easily done with vecsum(todigits(n, base)).
    • binary() was not intended to be released (todigits and todigitstring are supersets), but the documentation got left in. Remove docs.
  • ADDED
    • addmod(a, b, n) a + b mod n
    • mulmod(a, b, n) a * b mod n
    • divmod(a, b, n) a / b mod n
    • powmod(a, b, n) a ^ b mod n
    • sqrtmod(a, n) modular square root
    • is_euler_pseudoprime(n,a[...]) Euler test to given bases
    • is_primitive_root(r, n) is r a primitive root mod n
    • is_quasi_carmichael(n) is n a Quasi-Carmichael number
    • hclassno(n) Hurwitz class number H(n) * 12
    • sieve_range(n, width, depth) sieve to given depth, return offsets
  • FUNCTIONALITY AND PERFORMANCE
    • Fixed incorrect table entries for 2^16th Ramanujan prime count and nth_ramanujan_prime(23744).
    • foroddcomposites with certain arguments would start with 10 instead of 9.
    • lucasu and lucasv should return bigint types.
    • vecsum will handle 128-bit sums internally (performance increase).
    • Speedup is_carmichael.
    • Speedup znprimroot, 10% for small inputs, 10x for large composites.
    • Speedup znlog ~2x. It is now Rho racing an interleaved BSGS.
    • Change AKS to Bernstein 2003 theorem 4.1. 5-20x faster than Bornemann, 20000+x faster than V6.
    • sum_primes now uses tables for native sizes (performance increase).
    • ramanujan_tau uses Cohen's hclassno method instead of the sigma calculation. This is 3-4x faster than the GMP code for inputs > 300k, and much faster than the older PP code.
    • fromdigits much faster for large base-10 arrays. Timing is better than split plus join when output is a bigint.

Modules

Math::Prime::Util
Utilities related to prime numbers, including fast sieves and factoring
Math::Prime::Util::ECAffinePoint
Elliptic curve operations for affine points
Math::Prime::Util::ECProjectivePoint
Elliptic curve operations for projective points
Math::Prime::Util::MemFree
An auto-free object for Math::Prime::Util
Math::Prime::Util::PP
Pure Perl version of Math::Prime::Util
Math::Prime::Util::PPFE
PP front end for Math::Prime::Util
Math::Prime::Util::PrimalityProving
Primality proofs and certificates
Math::Prime::Util::PrimeArray
A tied array for primes
Math::Prime::Util::PrimeIterator
An object iterator for primes
Math::Prime::Util::RandomPrimes
Generate random primes
Math::Prime::Util::ZetaBigFloat
Perl Big Float versions of Riemann Zeta and R functions
ntheory
Number theory utilities

Examples

Other files