DUHHH
It's OBVIOUSLY 23 bars of 1/1
Actually, I don't think that would work. Denoting a semibrieve (whole note) would only really work for an incredibly slow piece of music.
A whole note is divisible by 2 and 4, so it's not a whole lot different than 2/2, 4/4, 8/8, etc...
Now something like 1/8, or 1/16, that is probably closer to what you mean, but the counting would still be different for something like 23/8, which can still be broken down into 5 bars of 4 and 1 bar of 3 or whatever variation you can think of, depending on the sound and feel of the music.