EIPs/EIPS/eip-160.md

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```
EIP: 160
Title: EXP cost increase
Author: Vitalik Buterin
Type: Standard Track
Category: Core
Status: Final
Created: 2016-10-20
```
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### Hard fork
[Spurious Dragon](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-607.md)
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### Parameters
- `FORK_BLKNUM`: 2,675,000
- `CHAIN_ID`: 1
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### 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.
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### Rationale
Benchmarks suggest that EXP is currently underpriced by a factor of about 48.
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### References
1. EIP-160 issue and discussion: https://github.com/ethereum/EIPs/issues/160