How this works / Signed record

Problem revision

Avalanche size exponent of the two-dimensional Abelian sandpile

This record was signed by PubPhys and added to the public log. Download the proof and check it with the open verifier: it recomputes every fingerprint, checks the PubPhys signature against the published key, finds the entry in the log and checks the Bitcoin date, without relying on this site.

Record hash
bc9f27464340ef3564b988fcf7adf64ecbfb0dbc39f9dc4f552601a87a4dbddc
Content hash
9441f84681444f7b27f1a0ff686fbd0d84ed58bb1e5072e666dffb91a341b08d
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
2,065
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:10Z — the Bitcoin date is the one that counts