EDITOR UPDATE (2017-08-15): This EIP is now located at https://github.com/ethereum/EIPs/blob/master/EIPS/eip-160.md. Please go there for the correct specification. The text below may be incorrect or outdated, and is not maintained.

Specification

If block.number >= FORK_BLKNUM, increase the gas cost of EXP from 10 + 10 per byte in the exponent to 10 + 50 per byte in the exponent.

Rationale

Benchmarks suggest that EXP is currently underpriced by a factor of about 4-8.