Prime

Prime appears as a corpse at Dot's Diner near the Jury Street Metro Station, but only after you answer the 3 terminals in the Museum of Technology correctly. He was presumably killed by raiders. On his body is a lot of caps, some meds, and the Xuanlong Assault Rifle.

Unmarked quest: Jiggs' Loot
Prime has left notes in certain terminals in the Museum to help his partner Jiggs find "his share of the loot".

The key to accessing the treasure are prime numbers. After the player selects the prime number from the other two information terminals in the Museum of Technology, the reward is a key to a safe in the museum. The player will then be told that Prime is waiting at Dot's Diner near the Jury Street Metro Station.

Related quests

 * Jiggs' Loot

Bugs

 * This may be a bug but there is a way you can see his face. You need to discover jury street metro station first, then start the unmarked quest. When he is telling you to meet him at Jury Street Metro Station then quickly leave and fast travel to Jury Street Metro Station. When you enter Dot's diner he'll still be dead but now you can see his head and both his arms and legs.
 * Sometimes Prime can be appear as a torso with his arms head and legs cut off. Furthermore he appears to have no clothes equipped but, if you search him he will still have all the loot.
 * If you resurrect him with the console (PC), he will turn hostile against the player. but If you then kill him again and loot him, he will have all of the Jiggs' Loot again, which makes it possible to get over 1000 Bottle Caps (instead of 500) and two or more Xuanlong Assault Rifles.