Prime p₀= 2531921520641092121 starts a Symmetric tuple of 12 consecutive primes, which form 6 twin primes (STPT).
d_n: 0 2 46 2 28 2 10 2 28 2 46 2 (?)
a_n: 0 2 48 50 78 80 90 92 120 122 168 170
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-FC] hl
db: batch=82, k=12, 2 46 2 28 2 10

SPT(16)	2531919949825278499	0 34 64 78 112 114 142 154 168 180 208 210 244 258 288 322	-1570815813622
STPT(10)	2531920292806913147	0 2 42 44 72 74 102 104 144 146	-1227834178974
STPT(10)	2531920653354932891	0 2 6 8 18 20 30 32 36 38	-867286159230
SPT(16)	2531921043991133957	0 12 24 86 126 144 162 164 282 284 302 320 360 422 434 446	-476649958164
STPT(12)	2531921127525197279	0 2 60 62 102 104 180 182 222 224 282 284	-393115894842
SPT(18)	2531921325843675473	0 24 26 36 38 108 156 186 200 204 218 248 296 366 368 378 380 404	-194797416648
SPT(16)	2531921546088648073	0 16 54 154 196 210 318 360 364 406 514 528 570 670 708 724	25447555952
STPT(10)	2531921555023849367	0 2 30 32 42 44 54 56 84 86	34382757246
STPT(10)	2531921929902529781	0 2 78 80 138 140 198 200 276 278	409261437660
STPT(10)	2531922159162516941	0 2 6 8 18 20 30 32 36 38	638521424820
SPT(16)	2531922345449912059	0 22 30 42 60 78 84 142 150 208 214 232 250 262 270 292	824808819938