user13440: Given that Taproot (SegWit v1) addresses are basically equivalent to a public key -- does that mean that there are a full 2256 possibilities?  Or is the overall number of possible addresses reduced in some way?

user208: Taproot outputs contain x-only (tweaked) public keys. Due to the lack of Y coordinates, the number of valid keys is halved.
The exact number of possible x-only keys is 2255 - 216210193282829828426210433197484072800.

13440: <p>Given that Taproot (SegWit v1) addresses are basically equivalent to a public key -- does that mean that there are a full 2<sup>256</sup> possibilities?  Or is the overall number of possible addresses reduced in some way?</p>
 208: <p>Taproot outputs contain <em>x-only</em> (tweaked) public keys. Due to the lack of Y coordinates, the number of valid keys is halved.</p>
<p>The exact number of possible x-only keys is <em>2<sup>255</sup> - 216210193282829828426210433197484072800</em>.</p>
