For non-ECC keys, this specifies the number of bits in the key to create.
For RSA keys, the minimum is 1024, the maximum is 4096, and the default is 3072.
For DSA keys, the minimum is 768, the maximum is 3072, and the default is 2048.
As per gpg’s behavior, values below the allowed ranges will be set to the respective defaults, and values above will saturate at the maximum.
+As per GPG’s behavior, values below the allowed ranges will be set to the respective defaults, and values above will saturate at the maximum.