Prime p₀= 2189323809613204291 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 10 56 42 4 60 8 58 68 6 34 6 68 58 8 60 4 42 56 10 (?)
a_n: 0 10 66 108 112 172 180 238 306 312 346 352 420 478 486 546 550 592 648 658
All 20 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 658
Found by: [SG-FC] hl
db: batch=81, k=20, 10 56 42 4 60 8 58 68 6 34

TPT(14)	2189322176950449941	0 2 78 80 96 98 138 140 180 182 210 212 240 242	-1632662754350
SPT(16)	2189322263984510917	0 10 12 34 70 82 100 132 184 216 234 246 282 304 306 316	-1545628693374
SPT(16)	2189322601607273191	0 22 42 48 78 82 132 156 202 226 276 280 310 316 336 358	-1208005931100
SPT(16)	2189322782513268859	0 52 130 150 172 204 228 262 270 304 328 360 382 402 480 532	-1027099935432
SPT(16)	2189322953863826321	0 36 60 66 72 120 176 182 186 192 248 296 302 308 332 368	-855749377970
TPT(14)	2189323734557388419	0 2 12 14 18 20 132 134 180 182 222 224 240 242	-75055815872
STPT(10)	2189323982680232537	0 2 42 44 72 74 102 104 144 146	173067028246
SPT(16)	2189324041720610537	0 2 26 42 72 80 152 182 264 294 366 374 404 420 444 446	232107406246
SPT(16)	2189324432863976851	0 18 28 36 46 120 136 150 196 210 226 300 310 318 328 346	623250772560
STPT(10)	2189324496177783917	0 2 30 32 42 44 54 56 84 86	686564579626
SPT(16)	2189324694705986687	0 42 54 104 126 146 152 174 182 204 210 230 252 302 314 356	885092782396