java.math · java.base · since Java 1.1

BigInteger

declaration

public class BigInteger extends Number implements Comparable<BigInteger>

Arbitrary-size integers: cryptography, combinatorics, ids beyond 64 bits. Immutable, operator-free arithmetic via methods.

Key methods

`static BigInteger valueOf(long) / BigInteger(String val)`	Creation.
`BigInteger add/multiply/pow/mod(…)`	Arithmetic.
`static BigInteger probablePrime(int bitLength, Random rnd)`	Crypto-grade prime generation.