Prime p₀= 2256807891010247699 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 18 50 40 12 80 10 8 34 12 134 12 34 8 10 80 12 40 50 18 (?)
a_n: 0 18 68 108 120 200 210 218 252 264 398 410 444 452 462 542 554 594 644 662
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: 662
Found by: JayPi
db: batch=81, k=20, 18 50 40 12 80 10 8 34 12 134

SPT(16)	2256806532115731751	0 22 30 36 78 96 106 130 138 162 172 190 232 238 246 268	-1358894515948
SPT(16)	2256806824604223623	0 36 56 146 210 266 330 350 420 440 504 560 624 714 734 770	-1066406024076
SPT(16)	2256807307848103201	0 22 60 72 136 142 156 162 220 226 240 246 310 322 360 382	-583162144498
SPT(16)	2256807361395924047	0 14 36 42 60 62 74 110 126 162 174 176 194 200 222 236	-529614323652
SPT(16)	2256807603938253661	0 18 28 60 72 96 120 138 280 298 322 346 358 390 400 418	-287071994038
SPT(16)	2256807608429884997	0 2 14 26 32 36 42 60 86 104 110 114 120 132 144 146	-282580362702
STPT(10)	2256807942268135337	0 2 12 14 72 74 132 134 144 146	51257887638
SPT(16)	2256808005526325443	0 70 96 100 124 136 154 190 324 360 378 390 414 418 444 514	114516077744
SPT(16)	2256808017329595203	0 14 24 80 108 126 138 168 206 236 248 266 294 350 360 374	126319347504
SPT(16)	2256808707543499201	0 30 36 78 96 120 138 186 222 270 288 312 330 372 378 408	816533251502
SPT(16)	2256809390416156073	0 54 78 84 98 210 248 290 348 390 428 540 554 560 584 638	1499405908374