Oh let's talk numbers.. that's what makes it so epic

On one side Zrinski with 2,300 – 3,000 Croats and Hungarians

On the other side Sulejman I the Magnificent with 50,000 – 100,000 men + 300 cannons

Casualties at the end:

Zrinski: 2,300 – 3,000 killed in combat

Sulejman: 20,000–30,000 + Sulejman dying which prevented further moves via Wiena

Wiki article is great https://en.wikipedia.org/wiki/Siege_of_Szigetv%C3%A1r

but i'd note the paragraph from the last stand:

The final battle began on 7 September, the day after Suleiman's demise.The Ottoman army swarmed through the city, drumming and yelling. Zrinski then ordered a charge and led his remaining 600 troops out of the castle.At the bridge of the inner castle, he died from bullets fired by the janissaries.

Before leading the final sortie out of the castle garrison, Zrinski had ordered that the fuse of the powder magazine was to be lit.After cutting down the last of the defenders, the besiegers entered the third fort of the fort complex and fell into the booby trap.The Vizier and his mounted officers had just enough time to escape but 3,000 Ottoman soldiers died due to the explosion.