The Last Theorem has 311 pages.
The Parrot's Theorem has 416 pages.
I'd say thousands of pages. The proof of Fermat's last theorem (alone) was over 100 pages.
The Last Olympian has 381 pages.
This was not the last theorem that Fermat wrote. Rather, it was the last one to be proven/disproven.
there are 381 pages in the Last Olympian.
Last Drinks has 377 pages.
The Last of the Nuba has 208 pages.
The Last Enchantment has 711 pages.
The Last of the Wine has 350 pages.
The Last Sitting has 188 pages.
The Last of the Immortals has 384 pages.
The Last Dragonslayer has 280 pages.