python numeric ai_generated true

OverflowError: Python int too large to convert to C long

ID: python/overflowerror-int-too-large

Also available as: JSON · Markdown
93%Fix Rate
95%Confidence
50Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
311 active — — —

Root Cause

Python arbitrary-precision int exceeds C long range when passed to C extension or numpy.

generic

Workarounds

  1. 88% success Use numpy int64 or Python's math module for the calculation 
    np.int64(value) if within 64-bit range, or use pure Python arithmetic
  2. 85% success Chunk the large integer operation to stay within C long bounds 
    Process in batches or use libraries that handle arbitrary precision natively

Dead Ends

Common approaches that don't work:

  1. Casting to float first 60% fail

    Loses precision for very large integers

  2. Upgrading to 64-bit Python 75% fail

    Does not help — C long is already 64-bit on 64-bit Linux; the int is simply too large

Error Chain

Frequently confused with: