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Function std.bigint.powmod

Fast power modulus calculation for BigInt operands.

BigInt powmod (
  BigInt base,
  BigInt exponent,
  BigInt modulus
) pure nothrow @safe;

Parameters

NameDescription
base the BigInt is basic operands.
exponent the BigInt is power exponent of base.
modulus the BigInt is modules to be modular of base ^ exponent.

Returns

The power modulus value of (base ^ exponent) % modulus.

Example

for powmod

BigInt base = BigInt("123456789012345678901234567890");
BigInt exponent = BigInt("1234567890123456789012345678901234567");
BigInt modulus = BigInt("1234567");

BigInt result = powmod(base, exponent, modulus);
writeln(result); // 359079

Authors

Don Clugston

License

Boost License 1.0.