Prime p₀= 1028981495915683993 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 30 76 18 42 8 16 20 6 10 2 10 6 20 16 8 42 18 76 30 (?)
a_n: 0 30 106 124 166 174 190 210 216 226 228 238 244 264 280 288 330 348 424 454
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: 454
Found by: stoneageman
db: batch=76, k=20, 30 76 18 42 8 16 20 6 10 2

STPT(10)	1028979910991328419	0 2 12 14 30 32 48 50 60 62	-1584924355574
STPT(10)	1028979943921274669	0 2 42 44 60 62 78 80 120 122	-1551994409324
SPT(16)	1028980203407061371	0 12 68 90 126 140 146 180 188 222 228 242 278 300 356 368	-1292508622622
SPT(16)	1028980624639012433	0 20 26 44 48 56 66 90 104 128 138 146 150 168 174 194	-871276671560
SPT(16)	1028980833873935219	0 12 14 18 30 54 72 92 120 140 158 182 194 198 200 212	-662041748774
TPT(14)	1028981401418953469	0 2 12 14 102 104 168 170 180 182 198 200 240 242	-94496730524
STPT(10)	1028981594526686807	0 2 30 32 42 44 54 56 84 86	98611002814
SPT(16)	1028981853641338393	0 34 90 96 114 124 144 154 156 166 186 196 214 220 276 310	357725654400
STPT(10)	1028981902327941827	0 2 42 44 72 74 102 104 144 146	406412257834
STPT(10)	1028982160447302167	0 2 30 32 42 44 54 56 84 86	664531618174
SPT(16)	1028982254901924769	0 12 40 42 64 138 160 162 220 222 244 318 340 342 370 382	758986240776