We know this since he reported a crash 1st time he ran the client on Sourceforge. In the debug file last block see by node was 49. Links: Sourceforge, debug.log is downloadable: https://web.archive.org/web/20141130200234/https://sourceforge.net/p/bitcoin/mailman/message/21295694/ https://mempool.space/block/00000000f067c09041ff0fcee3d91aeb7fbcc5654d3f766af2b4377aaee68d00