In alpha software prior to Bitcoin's release, the target interblock interval was 15 minutes, and it was reduced to 10 minutes for release.


Where can I find this alpha version for research?


1 Answer 1


Cryddit on Bitcointalk posted some source code that Satoshi supposedly emailed to him. This code contains a target interval of 15 minutes rather than 10. It is in https://bitcointalk.org/index.php?topic=382374.msg4108739#msg4108739. Search for nTargetSpacing.

  • 2
    Interesting, I wasn't aware of this. Apparently it also had 30 day retargetting periods (2880 blocks). Jul 4, 2021 at 6:52

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