# randU256

> **randU256**(): `bigint`

Defined in: [packages/synapse-core/src/utils/rand.ts:15](https://github.com/FilOzone/synapse-sdk/blob/5b0d94cdb43d49b460a669d64636e274a8d683fb/packages/synapse-core/src/utils/rand.ts#L15)

## Returns

`bigint`

a random unsigned big integer between `0` and `2**256-1` inclusive