| PRIME | The Starknet field prime. |
| ONE | One (1.0) as a felt252, equal to 2^64. |
| ONE_u128 | One (1.0) as a u128, equal to 2^64. |
| HALF | Half (0.5) as a felt252, equal to 2^63. |
| HALF_u128 | Half (0.5) as a u128, equal to 2^63. |
| MAX_u128 | Maximum u128 value (2^128 - 1). |