Prime p₀= 816518969594480921 starts a Symmetric tuple of 12 consecutive primes, which form 6 twin primes (STPT).
d_n: 0 2 28 2 28 2 46 2 28 2 28 2 (?)
a_n: 0 2 30 32 60 62 108 110 138 140 168 170
All 12 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 170
Found by: [SG]FX
db: batch=73, k=12, 2 28 2 28 2 46

STPT(10)	816517999755256817	0 2 42 44 72 74 102 104 144 146	-969839224104
STPT(10)	816518092354530659	0 2 42 44 60 62 78 80 120 122	-877239950262
TPT(14)	816518196695921141	0 2 30 32 36 38 90 92 168 170 270 272 288 290	-772898559780
SPT(18)	816518543580570931	0 28 36 48 58 66 72 100 106 162 168 196 202 210 220 232 240 268	-426013909990
SPT(16)	816518587505636359	0 60 64 70 82 120 144 154 180 190 214 252 264 270 274 334	-382088844562
SPT(16)	816518858066000093	0 6 14 30 60 78 158 168 176 186 266 284 314 330 338 344	-111528480828
SPT(16)	816519218259285803	0 8 14 20 26 36 78 86 138 146 188 198 204 210 216 224	248664804882
SPT(16)	816519332139528421	0 10 76 78 96 132 150 162 166 178 196 232 250 252 318 328	362545047500
SPT(16)	816519361911907613	0 26 36 60 114 116 134 180 200 246 264 266 320 344 354 380	392317426692
STPT(10)	816519380322960071	0 2 6 8 18 20 30 32 36 38	410728479150
TPT(14)	816520375289960177	0 2 90 92 102 104 174 176 282 284 342 344 480 482	1405695479256