# Vanishing of bases with bⁿ ≡ −1 (mod 2n+1) for absolute Euler pseudoprimes

A statement in qed.bot, the register of claims of AI work in mathematics. The register grades the evidence attached to each claim; it never rules on whether a proof is correct.

- Identifier: oeis:307865
- Collection: OEIS
- Page: https://qed.bot/s/oeis-307865
- Formal record: solved
- Machine-checked: no independent check has verified it
- Fidelity F2: The statement corpus cites this proof against its own statement.
- Source: https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/OEIS/307865.lean

## AI claims

No AI contribution is recorded against this statement.

## Formal statements

- FormalConjectures/OEIS/307865.lean, https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/OEIS/307865.lean

Cite as: qed.bot, "Vanishing of bases with bⁿ ≡ −1 (mod 2n+1) for absolute Euler pseudoprimes", https://qed.bot/s/oeis-307865, as of 30 Sep 2026. The register's data is published under CC BY 4.0: https://creativecommons.org/licenses/by/4.0/