11 May 18:15 (GMT) Butternut -- test of MK-46 primary and radiation implosion system, 6185 lb. device (347 lb. primary), yield 81 Kt (105 Kt predicted)

May 02:00 (GMT) Yellowwood -- test of full MK-46 thermonuclear system, 5885 lb. device, the second stage fizzled, producing a total yield of only 330 Kt

June 19:30 (GMT) Oak -- retest of redesigned full thermonuclear system. Device description: 6113 lb. overall, 346 lb. primary, 37 in. diameter, 100 in. long. Yield 8.9 Mt (5 Mt fission). Apparently the only full-yield test of the basic design ever conducted.