SAVAR, Bangladesh (CNN) -- Across from the detritus of Bangladesh's deadliest industrial disaster, up four flights of narrow stairs, and inside the makeshift offices of the recovery operations, stands a dry erase board that marks, in neat black handwriting, each life a nine-story building claimed when it pancaked to the ground last month.

On some days, as rescue workers pulled body after body from the mountain of steel and concrete, the number would spiral past 100.

On Monday, it settled at zero.

And so, after 20 days of non-stop digging, the army-led effort to pull out every last body from the ruins of Rana Plaza in the Dhaka suburb of Savar came to an end.

"We said we wouldn't stop until there were no more victims, and we didn't," said army Capt. Ibrahim Islam. "We are confident we have found them all." Photos: Building collapses in Bangladesh Companies pledge improved factories Factory survivor 'out of danger' Bangladesh survivor remains in hospital Diplomat: Factory collapse caused change How to fix worker rights in Bangladesh

The tally stands at 1,127 dead and 2,438 rescued alive. But Islam is the first to admit that only God knows exactly how many occupants were inside the building when it came tumbling down on April 24.

"We never were able to get a full accounting from the factory owners," Islam said, referring to the five garment factories housed in the building.

At least 98 people are still missing.

Another 59 are at a morgue, their bodies waiting to be identified through DNA tests.

More than 230 bodies are unclaimed, prompting a civics group to bury them in a Dhaka cemetery.

And what of the three severed heads and four unattached limbs that are listed in red ink on the board?

But, in the last several days, the number of bodies had dwindled, Islam said.

And after recovery crews made their last rounds Monday -- combing through the flooded basement of the structure and finding no one -- they felt comfortable they had done their due diligence.

On Tuesday, the army hands over the site to local authorities to complete the cleanup. They will gather one last time to pray for the souls who perished.

"They will always be in our memory," Islam said.